[原]发现一个好东西----Linux平台下常用工具描述：/var/cache/man/whatis ［C开头］
C开头：
c2ph (1) - Dump C structures as generated from cc -g -S stabs
c2ph [pstruct] (1) - Dump C structures as generated from cc -g -S stabs
c99 (1p) - compile standard C programs
ca (1ssl) - sample minimal CA application
cabs (3) - absolute value of a complex number
cabs (3p) - return a complex absolute value
cabsf [cabs] (3) - absolute value of a complex number
cabsf [cabs] (3p) - return a complex absolute value
cabsl [cabs] (3) - absolute value of a complex number
cabsl [cabs] (3p) - return a complex absolute value
cacheflush (2) - flush contents of instruction and/or data cache
cacos (3) - complex arc cosine
cacos (3p) - complex arc cosine functions
cacosf [cacos] (3) - complex arc cosine
cacosf [cacos] (3p) - complex arc cosine functions
cacosh (3) - complex arc hyperbolic cosine
cacosh (3p) - complex arc hyperbolic cosine functions
cacoshf [cacosh] (3) - complex arc hyperbolic cosine
cacoshf [cacosh] (3p) - complex arc hyperbolic cosine functions
cacoshl [cacosh] (3) - complex arc hyperbolic cosine
cacoshl [cacosh] (3p) - complex arc hyperbolic cosine functions
cacosl [cacos] (3) - complex arc cosine
cacosl [cacos] (3p) - complex arc cosine functions
cadaver (1) - A command-line WebDAV client for Unix
cadaver (rpm) - 命令行 WebDAV 客户
cairo-devel (rpm) - Cairo 开发库和头文件
cairo-java (rpm) - Java bindings for the Cairo library
cairo (rpm) - 矢量图形库
cal (1) - displays a calendar
cal (1p) - print a calendar
calcomp (4) - Calcomp input driver
callback (8) - call a user back, presenting a login prompt
calloc (3p) - a memory allocator
calloc [malloc] (3) - Allocate and free dynamic memory
can_change_color [curs_color] (3x) - curses color manipulation routines
canonicalize_file_name (3) - return the canonicalized filename
capabilities (7) - overview of Linux capabilities
cap_clear (3) - capability data object manipulation
cap_copy_ext (3) - capability state external representation translation
cap_copy_int [cap_copy_ext] (3) - capability state external representation translation
cap_dup [cap_init] (3) - capability data object storage management
cap_free [cap_init] (3) - capability data object storage management
cap_from_text (3) - capability state textual representation translation
capget (2) - set/get process capabilities
cap_get_flag [cap_clear] (3) - capability data object manipulation
capgetp [cap_get_proc] (3) - Linux specific capability manipulation on arbitrary processes
cap_get_proc (3) - POSIX capability manipulation on processes
capiinfo (8) - Show supported features of all installed CAPI2.0 controllers
cap_init (3) - capability data object storage management
capiplugin (8) - Plugin for pppd (Point-to-Point Protocol daemon)
_cap_names [cap_from_text] (3) - capability state textual representation translation
capset [capget] (2) - set/get process capabilities
cap_set_flag [cap_clear] (3) - capability data object manipulation
capsetp [cap_get_proc] (3) - Linux specific capability manipulation on arbitrary processes
cap_set_proc [cap_get_proc] (3) - POSIX capability manipulation on processes
cap_size [cap_copy_ext] (3) - capability state external representation translation
captoinfo (1m) - convert a termcap description into a terminfo description
cap_to_text [cap_from_text] (3) - capability state textual representation translation
card (1) - print reference card of program options
carg (3) - calculate the argument
carg (3p) - complex argument functions
cargf [carg] (3) - calculate the argument
cargf [carg] (3p) - complex argument functions
cargl [carg] (3) - calculate the argument
cargl [carg] (3p) - complex argument functions
carp [Carp] (3pm) - warn of errors (from perspective of caller)
Carp::Heavy (3pm) - heavy machinery, no user serviceable parts inside
casin (3) - complex arc sine
casin (3p) - complex arc sine functions
casinf [casin] (3) - complex arc sine
casinf [casin] (3p) - complex arc sine functions
casinh (3) - complex arc sine hyperbolic
casinh (3p) - complex arc hyperbolic sine functions
casinhf [casinh] (3) - complex arc sine hyperbolic
casinhf [casinh] (3p) - complex arc hyperbolic sine functions
casinhl [casinh] (3) - complex arc sine hyperbolic
casinhl [casinh] (3p) - complex arc hyperbolic sine functions
casinl [casin] (3) - complex arc sine
casinl [casin] (3p) - complex arc sine functions
cat (1) - concatenate files and print on the standard output
cat (1p) - concatenate and print files
catan (3) - complex arc tangents
catan (3p) - complex arc tangent functions
catanf [catan] (3) - complex arc tangents
catanf [catan] (3p) - complex arc tangent functions
catanh (3) - complex arc tangents hyperbolic
catanh (3p) - complex arc hyperbolic tangent functions
catanhf [catanh] (3) - complex arc tangents hyperbolic
catanhf [catanh] (3p) - complex arc hyperbolic tangent functions
catanhl [catanh] (3) - complex arc tangents hyperbolic
catanhl [catanh] (3p) - complex arc hyperbolic tangent functions
catanl [catan] (3) - complex arc tangents
catanl [catan] (3p) - complex arc tangent functions
catclose (3p) - close a message catalog descriptor
catclose [catopen] (3) - open/close a message catalog
catgets (3) - get message from a message catalog
catgets (3p) - read a program message
catopen (3) - open/close a message catalog
catopen (3p) - open a message catalog
cbc_crypt [des_crypt] (3) - fast DES encryption
CBQ [tc-cbq] (8) - Class Based Queueing
CBQ [tc-cbq-details] (8) - Class Based Queueing
cbreak [curs_inopts] (3x) - curses input options
cbrt (3) - cube root function
cbrt (3p) - cube root functions
cbrtf [cbrt] (3) - cube root function
cbrtf [cbrt] (3p) - cube root functions
cbrtl [cbrt] (3) - cube root function
cbrtl [cbrt] (3p) - cube root functions
ccid (rpm) - Generic USB CCID smart card reader driver
ccmakedep (1x) - create dependencies in makefiles using a C compiler
ccos (3) - complex cosine function
ccos (3p) - complex cosine functions
ccosf [ccos] (3) - complex cosine function
ccosf [ccos] (3p) - complex cosine functions
ccosh (3) - complex hyperbolic cosine
ccosh (3p) - complex hyperbolic cosine functions
ccoshf [ccosh] (3) - complex hyperbolic cosine
ccoshf [ccosh] (3p) - complex hyperbolic cosine functions
ccoshl [ccosh] (3) - complex hyperbolic cosine
ccoshl [ccosh] (3p) - complex hyperbolic cosine functions
ccosl [ccos] (3) - complex cosine function
ccosl [ccos] (3p) - complex cosine functions
cd (1p) - change the working directory
cd [builtins] (1) - bash built-in commands, see bash(1)
cdda2wav (1) - a sampling utility that dumps CD audio data into wav sound files
cdda2wav (rpm) - 用来从数码音频光盘中取样或复制 .wav 文件的工具。
cdparanoia-libs (rpm) - libcdda_paranoia (Paranoia III) 的库。
cdparanoia (Paranoia release III) [cdparanoia] (1) - an audio CD reading utility which includes extra data verification features
cdparanoia (rpm) - 一种光盘数码音频（CDDA）抽取工具（或称 ripper）。
cdrdao (1) - writes audio CD-Rs in disc-at-once mode
cdrdao (rpm) - 使用整盘 (DAO) 模式写入音频可录光盘。
cdrecord (1) - record audio or data Compact Disks or Digital Versatile Disks from a master
cdrecord (rpm) - 命令行式 CD/DVD 录制程序。
ceil (3) - ceiling function: smallest integral value not less than argument
ceil (3p) - ceiling value function
ceilf [ceil] (3) - ceiling function: smallest integral value not less than argument
ceilf [ceil] (3p) - ceiling value function
ceill [ceil] (3) - ceiling function: smallest integral value not less than argument
ceill [ceil] (3p) - ceiling value function
CellsOfScreen [BlackPixelOfScreen] (3x) - screen information functions and macros
cerf (3) - complex error function
cerfc [cerf] (3) - complex error function
cerfcf [cerf] (3) - complex error function
cerfcl [cerf] (3) - complex error function
cerff [cerf] (3) - complex error function
cerfl [cerf] (3) - complex error function
cexp2 (3) - base-2 exponent of a complex number
cexp2f [cexp2] (3) - base-2 exponent of a complex number
cexp2l [cexp2] (3) - base-2 exponent of a complex number
cexp (3) - complex exponential function
cexp (3p) - complex exponential functions
cexpf [cexp] (3) - complex exponential function
cexpf [cexp] (3p) - complex exponential functions
cexpl [cexp] (3) - complex exponential function
cexpl [cexp] (3p) - complex exponential functions
cfgetispeed (3p) - get input baud rate
cfgetispeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfgetospeed (3p) - get output baud rate
cfgetospeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
c++filt (1) - Demangle C++ and Java symbols
cflow (1p) - generate a C-language flowgraph (DEVELOPMENT)
cfmakeraw [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfree (3) - free allocated memory
cfsetispeed (3p) - set input baud rate
cfsetispeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfsetospeed (3p) - set output baud rate
cfsetospeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfsetspeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
CGI (3pm) - Simple Common Gateway Interface Class
CGI::Apache (3pm) - Backward compatibility module for CGI.pm
CGI::Carp (3pm) - CGI routines for writing to the HTTPD (or other) error log
CGI::Cookie (3pm) - Interface to Netscape Cookies
CGI::Fast (3pm) - CGI Interface for Fast CGI
CGI::Pretty (3pm) - module to produce nicely formatted HTML code
CGI::Push (3pm) - Simple Interface to Server Push
CGI::Switch (3pm) - Backward compatibility module for defunct CGI::Switch
CGI::Util (3pm) - Internal utilities used by CGI module
chacl (1) - change the access control list of a file or directory
chage (1) - change user password expiry information
charmap (5) - character symbols to define character encodings
charnames (3pm) - define character names for eN{named} string literal escapes
charsets (7) - programmer's view of character sets and internationalization
chat (8) - Automated conversational script with a modem
chattr (1) - change file attributes on a Linux second extended file system
chcat (8) - change file security category
chcon (1) - change security context
chdir (2) - change working directory
chdir (3p) - change working directory
chfn (1) - change your finger information
chgat [curs_attr] (3x) - curses character and window attribute control routines
chgrp (1) - change group ownership
chgrp (1p) - change the file group ownership
chips (4) - Chips and Technologies video driver
chkconfig (8) - updates and queries runlevel information for system services
chkconfig (rpm) - 用来维护 /etc/rc*.d 文件层次的系统工具。
chkfontpath (8) - simple interface for adding, removing, and listing directories in the X font server's path
chkfontpath (rpm) - 为 X 字体服务器编辑字体路径的简单界面。
chmod (1) - change file access permissions
chmod (1p) - change the file modes
chmod (2) - change permissions of a file
chmod (3p) - change mode of a file
chown (1) - change file owner and group
chown (1p) - change the file ownership
chown (2) - change ownership of a file
chown (3p) - change owner and group of a file
chpasswd (8) - update passwords in batch mode
chpasswd (8) - 成批更新用户的口令
chroot (1) - run command or interactive shell with special root directory
chroot (2) - change root directory
chrt (1) - manipulate real-time attributes of a process
chsh (1) - change your login shell
chvt (1) - change foreground virtual terminal
ci (1) - check in RCS revisions
cimag (3) - get imaginary part of a complex number
cimag (3p) - complex imaginary functions
cimagf [cimag] (3) - get imaginary part of a complex number
cimagf [cimag] (3p) - complex imaginary functions
cimagl [cimag] (3) - get imaginary part of a complex number
cimagl [cimag] (3p) - complex imaginary functions
ciphers (1ssl) - SSL cipher display and cipher list tool
ciptool (1) - Bluetooth Common ISDN Access Profile (CIP)
CIRCLEQ_ENTRY [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_HEAD [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INIT [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_AFTER [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_BEFORE [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_HEAD [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_TAIL [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_REMOVE [queue] (3) - implementations of lists, tail queues, and circular queues
cirrus (4) - Cirrus Logic video driver
citron (4) - Citron Infrared Touch Driver (CiTouch)
cjpeg (1) - compress an image file to a JPEG file
cksum (1) - checksum and count the bytes in a file
cksum (1p) - write file checksums and sizes
classes.conf [classes] (5) - class configuration file for cups
classpathx-jaf-javadoc (rpm) - classpathx-jaf 的 Javadoc 文档
classpathx-jaf (rpm) - GNU JavaBeans(tm) 激活框架
classpathx-mail-javadoc (rpm) - classpathx-mail 的 Java
classpathx-mail (rpm) - GNU JavaMail(tm)
Class::Struct (3pm) - declare struct-like datatypes as Perl classes
cleanlinks (1x) - remove dangling symbolic links and empty directories
clear (1) - clear the terminal screen
clear [curs_clear] (3x) - clear all or part of a curses window
clearenv (3) - clear the environment
clearerr (3p) - clear indicators on a stream
clearerr [ferror] (3) - check and reset stream status
clearok [curs_outopts] (3x) - curses output options
client.conf [client] (5) - client configuration file for cups
ClientWhitePointOfCCC [DisplayOfCCC] (3x) - Color Conversion Context macros
clock (3) - Determine processor time
clock (3p) - report CPU time used
clockdiff (8) - measure clock difference between hosts
clock_getcpuclockid (3p) - access a process CPU-time clock (ADVANCED REALTIME)
clock_getres (2) - Get the resolution of any clock
clock_getres (3) - clock and time functions
clock_getres [clock_gettime] (3p) - clock and timer functions (REALTIME)
clock_gettime (2) - Return the current timespec value of tp for the specified clock
clock_gettime (3p) - clock and timer functions (REALTIME)
clock_gettime [clock_getres] (3) - clock and time functions
clock_nanosleep (2) - Suspend execution of the currently running thread
clock_nanosleep (3p) - high resolution sleep with specifiable clock (ADVANCED REALTIME)
clock_settime (2) - Set the specified clock
clock_settime [clock_getres] (3) - clock and time functions
clock_settime [clock_gettime] (3p) - clock and timer functions (REALTIME)
clog10 (3) - base-10 logarithm of a complex number
clog10f [clog10] (3) - base-10 logarithm of a complex number
clog10l [clog10] (3) - base-10 logarithm of a complex number
clog2 (3) - base-2 logarithm of a complex number
clog2f [clog2] (3) - base-2 logarithm of a complex number
clog2l [clog2] (3) - base-2 logarithm of a complex number
clog (3) - natural logarithm of a complex number
clog (3p) - complex natural logarithm functions
clogf [clog] (3) - natural logarithm of a complex number
clogf [clog] (3p) - complex natural logarithm functions
clogl [clog] (3) - natural logarithm of a complex number
clogl [clog] (3p) - complex natural logarithm functions
clone2 [clone] (2) - create a child process
clone (2) - create a child process
close (2) - close a file descriptor
close (3p) - close a file descriptor
closedir (3) - close a directory
closedir (3p) - close a directory stream
closelog [syslog] (3p) - control system log
closelog [syslog] (3) - send messages to the system logger
clrtobot [curs_clear] (3x) - clear all or part of a curses window
clrtoeol [curs_clear] (3x) - clear all or part of a curses window
cluck [Carp] (3pm) - warn of errors with stack backtrace (not exported by default)
cmp (1) - compare two files
cmp (1p) - compare two files
CMSG_ALIGN [cmsg] (3) - Access ancillary data
CMSG_FIRSTHDR [cmsg] (3) - Access ancillary data
CMSG_NXTHDR [cmsg] (3) - Access ancillary data
CMSG_SPACE [cmsg] (3) - Access ancillary data
cmuwmtopbm (1) - convert a CMU window manager bitmap into a PBM image
co (1) - check out RCS revisions
col (1) - filter reverse line feeds from input
colcrt (1) - filter nroff output for CRT previewing
colon (1p) - null utility
color_content [curs_color] (3x) - curses color manipulation routines
COLOR_PAIR [curs_color] (3x) - curses color manipulation routines
color_set [curs_attr] (3x) - curses character and window attribute control routines
colrm (1) - remove columns from a file
column (1) - columnate lists
combinediff (1) - create a cumulative unified patch from two incremental patches
com_err (3) - common error display routine
comm (1) - compare two sorted files line by line
comm (1p) - select or reject lines common to two files
command (1p) - execute a simple command
command [builtins] (1) - bash built-in commands, see bash(1)
compare (1) - mathematically and visually annotate the difference between an image and its reconstruction
compat-libgcc-296 (rpm) - 兼容 2.96-RH libgcc 程序
compat-libstdc++-296 (rpm) - 兼容的 2.96-RH 标准 C++ 库
compat-libstdc++-33 (rpm) - 兼容的标准 C++ 库
compgen [builtins] (1) - bash built-in commands, see bash(1)
compile_et (1) - error table compiler
complete [builtins] (1) - bash built-in commands, see bash(1)
complex (7) - basics of complex mathematics
complex.h [complex] (0p) - complex arithmetic
composite (1) - overlaps one image over another
Compress::Zlib (3pm) - Interface to zlib compression library
comps-extras (rpm) - 组件的图像以及用于 comps 文件的工具
confess [Carp] (3pm) - die of errors with stack backtrace
Config (3pm) - access Perl configuration information
config (5ssl) - OpenSSL CONF library configuration files
config.guess [config] (1) - guess the build system triplet
config.sub [config] (1) - validate and canonicalize a configuration triplet
config-util (5) - Common PAM configuration file for configuration utilities
CONF_modules_free (3ssl) - OpenSSL configuration cleanup functions
CONF_modules_load [CONF_modules_free] (3ssl) - OpenSSL configuration cleanup functions
CONF_modules_load [CONF_modules_load_file] (3ssl) - OpenSSL configuration functions
CONF_modules_load_file (3ssl) - OpenSSL configuration functions
CONF_modules_unload [CONF_modules_free] (3ssl) - OpenSSL configuration cleanup functions
confstr (3) - get configuration dependent string variables
confstr (3p) - get configurable variables
conj (3) - calculate the complex conjugate
conj (3p) - complex conjugate functions
conjf [conj] (3) - calculate the complex conjugate
conjf [conj] (3p) - complex conjugate functions
conjl [conj] (3) - calculate the complex conjugate
conjl [conj] (3p) - complex conjugate functions
conjure (1) - interprets and executes scripts written in the Magick Scripting Language (MSL)
connect (2) - initiate a connection on a socket
connect (3p) - connect a socket
ConnectionNumber [AllPlanes] (3x) - Display macros and functions
console.apps [console] (5) - specify console - accessible privileged applications
console_codes (4) - Linux console escape and control sequences
console.handlers [console] (5) - file specifying handlers of console lock and unlock events
consolehelper (8) - A wrapper that helps console users run system programs
console ioctl [console_ioctl] (4) - ioctl's for console terminal and virtual consoles
console.perms [console] (5) - permissions control file for users at the system console
consoletype (1) - print type of the console connected to standard input
constant (3pm) - Perl pragma to declare constants
context_free [context_new] (3) - Routines to manipulate SELinux security contexts
context_new (3) - Routines to manipulate SELinux security contexts
context_range_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_range_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_role_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_role_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_str [context_new] (3) - Routines to manipulate SELinux security contexts
context_type_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_type_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_user_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_user_set [context_new] (3) - Routines to manipulate SELinux security contexts
continue (1p) - continue for, while, or until loop
continue [builtins] (1) - bash built-in commands, see bash(1)
convert (1) - convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more
convertquota (8) - convert quota from old file format to new one
coolkey-devel (rpm) - CoolKey Applet libraries
coolkey (rpm) - CoolKey PKCS #11 module
C operator [operator] (7) - C operator precedence and order of evaluation
copysign (3) - copy sign of a number
copysign (3p) - number manipulation function
copysignf [copysign] (3) - copy sign of a number
copysignf [copysign] (3p) - number manipulation function
copysignl [copysign] (3) - copy sign of a number
copysignl [copysign] (3p) - number manipulation function
copywin [curs_overlay] (3x) - overlay and manipulate overlapped curses windows
core (5) - core dump file
coreutils (rpm) - GNU 核心工具：一组 shell 脚本常用的工具
cos (3) - cosine function
cos (3p) - cosine function
cosf [cos] (3) - cosine function
cosf [cos] (3p) - cosine function
cosh (3) - hyperbolic cosine function
cosh (3p) - hyperbolic cosine functions
coshf [cosh] (3) - hyperbolic cosine function
coshf [cosh] (3p) - hyperbolic cosine functions
coshl [cosh] (3) - hyperbolic cosine function
coshl [cosh] (3p) - hyperbolic cosine functions
cosl [cos] (3) - cosine function
cosl [cos] (3p) - cosine function
cp (1) - copy files and directories
cp (1p) - copy files
cpan (1) - easily interact with CPAN from the command line
CPAN (3pm) - query, download and build perl modules from CPAN sites
CPAN::FirstTime (3pm) - Utility for CPAN::Config file Initialization
CPAN::Nox (3pm) - Wrapper around CPAN.pm without using any XS module
cpio (1) - copy files to and from archives
cpio.h [cpio] (0p) - cpio archive values
cpio (rpm) - GNU 归档程序。
cpow (3) - complex power function
cpow (3p) - complex power functions
cpowf [cpow] (3) - complex power function
cpowf [cpow] (3p) - complex power functions
cpowl [cpow] (3) - complex power function
cpowl [cpow] (3p) - complex power functions
cpp (1) - The C Preprocessor
cpp (rpm) - C 预处理器。
cproj (3p) - complex projection functions
cproj (3) - project into Riemann Sphere
cprojf [cproj] (3p) - complex projection functions
cprojf [cproj] (3) - project into Riemann Sphere
cprojl [cproj] (3p) - complex projection functions
cprojl [cproj] (3) - project into Riemann Sphere
CPU_CLR [sched_setaffinity] (2) - set and get a process's CPU affinity mask
CPU_ISSET [sched_setaffinity] (2) - set and get a process's CPU affinity mask
CPU_SET [sched_setaffinity] (2) - set and get a process's CPU affinity mask
cpuspeed (rpm) - CPU 频率调节程序
CPU_ZERO [sched_setaffinity] (2) - set and get a process's CPU affinity mask
cracklib-dicts (rpm) - 标准 CrackLib 词典。
cracklib (rpm) - 口令检查库。
crash (8) - Analyze Linux crash data or a live system
crash (rpm) - 系统崩溃处理工具；netdump, diskdump, LKCD 或 mcore dumpfiles
creal (3) - get real part of a complex number
creal (3p) - complex real functions
crealf [creal] (3) - get real part of a complex number
crealf [creal] (3p) - complex real functions
creall [creal] (3) - get real part of a complex number
creall [creal] (3p) - complex real functions
creat (3p) - create a new file or rewrite an existing one
create_module (2) - create a loadable module entry
creat [open] (2) - open and possibly create a file or device
crl (1ssl) - CRL utility
crl2pkcs7 (1ssl) - Create a PKCS#7 structure from a CRL and certificates
croak [Carp] (3pm) - die of errors (from perspective of caller)
cron (8) - daemon to execute scheduled commands (ISC Cron V4.1)
crontab (1) - maintain crontab files for individual users (ISC Cron V4.1)
crontab (1p) - schedule periodic background work
crontab (5) - tables for driving cron (ISC Cron V4.1)
crontabs (rpm) - 用来调度程序执行的根 crontab 文件。
crypt (3) - password and data encryption
crypt (3p) - string encoding function (CRYPT)
cryptix-asn1-javadoc (rpm) - cryptix-asnl 的 Java 文档
cryptix-javadoc (rpm) - cryptix 的 Java 文档
crypto (3ssl) - OpenSSL cryptographic library
CRYPTO_destroy_dynlockid [threads] (3ssl) - OpenSSL thread support
CRYPTO_get_ex_data [CRYPTO_set_ex_data] (3ssl) - internal application specific data functions
CRYPTO_get_new_dynlockid [threads] (3ssl) - OpenSSL thread support
CRYPTO_lock [threads] (3ssl) - OpenSSL thread support
CRYPTO_num_locks [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_create_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_destroy_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_lock_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_ex_data (3ssl) - internal application specific data functions
CRYPTO_set_id_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_locking_callback [threads] (3ssl) - OpenSSL thread support
cryptsetup (8) - setup cryptographic volumes for dm-crypt (including LUKS extension)
cryptsetup-luks (rpm) - 设置加密文件系统的工具。
cscope (1) - interactively examine a C program
cscope (rpm) - C 源代码树查找和浏览工具。
csin (3) - complex sine function
csin (3p) - complex sine functions
csinf [csin] (3) - complex sine function
csinf [csin] (3p) - complex sine functions
csinh (3) - complex hyperbolic sine
csinh (3p) - complex hyperbolic sine functions
csinhf [csinh] (3) - complex hyperbolic sine
csinhf [csinh] (3p) - complex hyperbolic sine functions
csinhl [csinh] (3) - complex hyperbolic sine
csinhl [csinh] (3p) - complex hyperbolic sine functions
csinl [csin] (3) - complex sine function
csinl [csin] (3p) - complex sine functions
csplit (1p) - split files based on context
csplit (1) - split a file into sections determined by context lines
csqrt (3) - complex square root
csqrt (3p) - complex square root functions
csqrtf [csqrt] (3) - complex square root
csqrtf [csqrt] (3p) - complex square root functions
csqrtl [csqrt] (3) - complex square root
csqrtl [csqrt] (3p) - complex square root functions
ctags (1) - Generate tag files for source code
ctags (1p) - create a tags file (DEVELOPMENT, FORTRAN)
ctags (rpm) - C 编程语言索引和(或)交叉参考工具。
ctan (3) - complex tangent function
ctan (3p) - complex tangent functions
ctanf [ctan] (3) - complex tangent function
ctanf [ctan] (3p) - complex tangent functions
ctanh (3) - complex hyperbolic tangent
ctanh (3p) - complex hyperbolic tangent functions
ctanhf [ctanh] (3) - complex hyperbolic tangent
ctanhf [ctanh] (3p) - complex hyperbolic tangent functions
ctanhl [ctanh] (3) - complex hyperbolic tangent
ctanhl [ctanh] (3p) - complex hyperbolic tangent functions
ctanl [ctan] (3) - complex tangent function
ctanl [ctan] (3p) - complex tangent functions
ctermid (3) - get controlling terminal name
ctermid (3p) - generate a pathname for the controlling terminal
ctime (3p) - convert a time value to a date and time string
ctime (3) - transform date and time to broken-down time or ASCII
ctime_r [ctime] (3p) - convert a time value to a date and time string
ctime_r [ctime] (3) - transform date and time to broken-down time or ASCII
ctrlaltdel (8) - set the function of the Ctrl-Alt-Del combination
ctype.h [ctype] (0p) - character types
cue2toc (1) - convert CUE to TOC format
cupsaddsmb (8) - export printers to samba for windows clients
cups-config (1) - get cups api, compiler, directory, and link information
cupsd (8) - common unix printing system daemon
cupsd.conf [cupsd] (5) - server configuration file for cups
cups-deviced (8) - cups device daemon
cupsdisable [cupsenable] (8) - stop/start printers and classes
cups-driverd (8) - cups driver daemon
cupsenable (8) - stop/start printers and classes
cups-libs (rpm) - 通用 Unix 打印系统 ―库
cups-lpd (8) - receive print jobs and report printer status to lpd clients
cups-polld (8) - cups printer polling daemon
cups (rpm) - 通用 Unix 打印系统
cupstestdsc (1) - test conformance of postscript files
cupstestppd (1) - test conformance of ppd files
curl (1) - transfer a URL
curl-config (1) - Get information about a libcurl installation
curl-devel (rpm) - 用 libcurl 建构程序所需的文件。
curl_easy_cleanup (3) - End a libcurl easy session
curl_easy_duphandle (3) - Clone a libcurl session handle
curl_easy_escape (3) - URL encodes the given string
curl_easy_getinfo (3) - extract information from a curl handle
curl_easy_init (3) - Start a libcurl easy session
curl_easy_perform (3) - Perform a file transfer
curl_easy_reset (3) - reset all options of a libcurl session handle
curl_easy_setopt (3) - set options for a curl easy handle
curl_easy_strerror (3) - return string describing error code
curl_easy_unescape (3) - URL decodes the given string
curl_escape (3) - URL encodes the given string
curl_formadd (3) - add a section to a multipart/formdata HTTP POST
curl_formfree (3) - free a previously build multipart/formdata HTTP POST chain
curl_formget (3) - serialize a previously build multipart/formdata HTTP POST chain
curl_free (3) - reclaim memory that has been obtained through a libcurl call
curl_getdate (3) - Convert an date string to number of seconds since January 1, 1970
curl_getenv (3) - return value for environment name
curl_global_cleanup (3) - global libcurl cleanup
curl_global_init (3) - Global libcurl initialisation
curl_global_init_mem (3) - Global libcurl initialisation with memory callbacks
curl_maprintf [curl_mprintf] (3) - formatted output conversion
curl_mfprintf [curl_mprintf] (3) - formatted output conversion
curl_mprintf (3) - formatted output conversion
curl_msnprintf [curl_mprintf] (3) - formatted output conversion
curl_msprintf curl_mvaprintf [curl_mprintf] (3) - formatted output conversion
curl_multi_add_handle (3) - add an easy handle to a multi session
curl_multi_assign (3) - set data to associated with an internal socket
curl_multi_cleanup (3) - close down a multi session
curl_multi_fdset (3) - extracts file descriptor information from a multi handle
curl_multi_info_read (3) - read multi stack informationals
curl_multi_init (3) - create a multi handle
curl_multi_perform (3) - reads/writes available data from each easy handle
curl_multi_remove_handle (3) - remove an easy handle from a multi session
curl_multi_setopt (3) - set options for a curl multi handle
curl_multi_socket (3) - reads/writes available data
curl_multi_strerror (3) - return string describing error code
curl_multi_timeout (3) - how long to wait for action before proceeding
curl_mvfprintf [curl_mprintf] (3) - formatted output conversion
curl_mvprintf [curl_mprintf] (3) - formatted output conversion
curl_mvsnprintf [curl_mprintf] (3) - formatted output conversion
curl_mvsprintf [curl_mprintf] (3) - formatted output conversion
curl (rpm) - 从远程服务器（FTP、HTTP、及其它）中获取文件的工具。
curl_share_cleanup (3) - Clean up a shared object
curl_share_init (3) - Create a shared object
curl_share_setopt (3) - Set options for a shared object
curl_share_strerror (3) - return string describing error code
curl_slist_append (3) - add a string to an slist
curl_slist_free_all (3) - free an entire curl_slist list
curl_strequal (3) - case insensitive string comparisons
curl_strnequal [curl_strequal] (3) - case insensitive string comparisons
curl_unescape (3) - URL decodes the given string
curl_version (3) - returns the libcurl version string
curl_version_info (3) - returns run-time libcurl version info
curses_version [curs_extend] (3x) - miscellaneous curses extensions
curs_set [curs_kernel] (3x) - low-level curses routines
cuserid [getlogin] (3) - get user name
cut (1p) - cut out selected fields of each line of a file
cut (1) - remove sections from each line of files
cvs (1) - Concurrent Versions System
cvs (5) - Concurrent Versions System support files
cvsbug (8) - send problem report (PR) about CVS to a central support site
cvs (rpm) - 版本控制系统。
cvt (1) - calculate VESA CVT mode lines
Cwd (3pm) - get pathname of current working directory
cxpm (1x) - Check an XPM (X PixMap) file - XPM 1, 2, or 3
cxref (1p) - generate a C-language program cross-reference table (DEVELOPMENT)
cyrix (4) - Cyrix video driver
cyrus-sasl-devel (rpm) - 用 Cyrus SASL 开发程序所需的文件。
cyrus-sasl-lib (rpm) - 使用 Cyrus SASL 的应用程序需要的共享库。
cyrus-sasl-plain (rpm) - Cyrus SASL 的 PLAIN 和 LOGIN 支持。
cyrus-sasl (rpm) - Cyrus SASL 库。
cytune (8) - Tune Cyclades driver parameters
c2ph (1) - Dump C structures as generated from cc -g -S stabs
c2ph [pstruct] (1) - Dump C structures as generated from cc -g -S stabs
c99 (1p) - compile standard C programs
ca (1ssl) - sample minimal CA application
cabs (3) - absolute value of a complex number
cabs (3p) - return a complex absolute value
cabsf [cabs] (3) - absolute value of a complex number
cabsf [cabs] (3p) - return a complex absolute value
cabsl [cabs] (3) - absolute value of a complex number
cabsl [cabs] (3p) - return a complex absolute value
cacheflush (2) - flush contents of instruction and/or data cache
cacos (3) - complex arc cosine
cacos (3p) - complex arc cosine functions
cacosf [cacos] (3) - complex arc cosine
cacosf [cacos] (3p) - complex arc cosine functions
cacosh (3) - complex arc hyperbolic cosine
cacosh (3p) - complex arc hyperbolic cosine functions
cacoshf [cacosh] (3) - complex arc hyperbolic cosine
cacoshf [cacosh] (3p) - complex arc hyperbolic cosine functions
cacoshl [cacosh] (3) - complex arc hyperbolic cosine
cacoshl [cacosh] (3p) - complex arc hyperbolic cosine functions
cacosl [cacos] (3) - complex arc cosine
cacosl [cacos] (3p) - complex arc cosine functions
cadaver (1) - A command-line WebDAV client for Unix
cadaver (rpm) - 命令行 WebDAV 客户
cairo-devel (rpm) - Cairo 开发库和头文件
cairo-java (rpm) - Java bindings for the Cairo library
cairo (rpm) - 矢量图形库
cal (1) - displays a calendar
cal (1p) - print a calendar
calcomp (4) - Calcomp input driver
callback (8) - call a user back, presenting a login prompt
calloc (3p) - a memory allocator
calloc [malloc] (3) - Allocate and free dynamic memory
can_change_color [curs_color] (3x) - curses color manipulation routines
canonicalize_file_name (3) - return the canonicalized filename
capabilities (7) - overview of Linux capabilities
cap_clear (3) - capability data object manipulation
cap_copy_ext (3) - capability state external representation translation
cap_copy_int [cap_copy_ext] (3) - capability state external representation translation
cap_dup [cap_init] (3) - capability data object storage management
cap_free [cap_init] (3) - capability data object storage management
cap_from_text (3) - capability state textual representation translation
capget (2) - set/get process capabilities
cap_get_flag [cap_clear] (3) - capability data object manipulation
capgetp [cap_get_proc] (3) - Linux specific capability manipulation on arbitrary processes
cap_get_proc (3) - POSIX capability manipulation on processes
capiinfo (8) - Show supported features of all installed CAPI2.0 controllers
cap_init (3) - capability data object storage management
capiplugin (8) - Plugin for pppd (Point-to-Point Protocol daemon)
_cap_names [cap_from_text] (3) - capability state textual representation translation
capset [capget] (2) - set/get process capabilities
cap_set_flag [cap_clear] (3) - capability data object manipulation
capsetp [cap_get_proc] (3) - Linux specific capability manipulation on arbitrary processes
cap_set_proc [cap_get_proc] (3) - POSIX capability manipulation on processes
cap_size [cap_copy_ext] (3) - capability state external representation translation
captoinfo (1m) - convert a termcap description into a terminfo description
cap_to_text [cap_from_text] (3) - capability state textual representation translation
card (1) - print reference card of program options
carg (3) - calculate the argument
carg (3p) - complex argument functions
cargf [carg] (3) - calculate the argument
cargf [carg] (3p) - complex argument functions
cargl [carg] (3) - calculate the argument
cargl [carg] (3p) - complex argument functions
carp [Carp] (3pm) - warn of errors (from perspective of caller)
Carp::Heavy (3pm) - heavy machinery, no user serviceable parts inside
casin (3) - complex arc sine
casin (3p) - complex arc sine functions
casinf [casin] (3) - complex arc sine
casinf [casin] (3p) - complex arc sine functions
casinh (3) - complex arc sine hyperbolic
casinh (3p) - complex arc hyperbolic sine functions
casinhf [casinh] (3) - complex arc sine hyperbolic
casinhf [casinh] (3p) - complex arc hyperbolic sine functions
casinhl [casinh] (3) - complex arc sine hyperbolic
casinhl [casinh] (3p) - complex arc hyperbolic sine functions
casinl [casin] (3) - complex arc sine
casinl [casin] (3p) - complex arc sine functions
cat (1) - concatenate files and print on the standard output
cat (1p) - concatenate and print files
catan (3) - complex arc tangents
catan (3p) - complex arc tangent functions
catanf [catan] (3) - complex arc tangents
catanf [catan] (3p) - complex arc tangent functions
catanh (3) - complex arc tangents hyperbolic
catanh (3p) - complex arc hyperbolic tangent functions
catanhf [catanh] (3) - complex arc tangents hyperbolic
catanhf [catanh] (3p) - complex arc hyperbolic tangent functions
catanhl [catanh] (3) - complex arc tangents hyperbolic
catanhl [catanh] (3p) - complex arc hyperbolic tangent functions
catanl [catan] (3) - complex arc tangents
catanl [catan] (3p) - complex arc tangent functions
catclose (3p) - close a message catalog descriptor
catclose [catopen] (3) - open/close a message catalog
catgets (3) - get message from a message catalog
catgets (3p) - read a program message
catopen (3) - open/close a message catalog
catopen (3p) - open a message catalog
cbc_crypt [des_crypt] (3) - fast DES encryption
CBQ [tc-cbq] (8) - Class Based Queueing
CBQ [tc-cbq-details] (8) - Class Based Queueing
cbreak [curs_inopts] (3x) - curses input options
cbrt (3) - cube root function
cbrt (3p) - cube root functions
cbrtf [cbrt] (3) - cube root function
cbrtf [cbrt] (3p) - cube root functions
cbrtl [cbrt] (3) - cube root function
cbrtl [cbrt] (3p) - cube root functions
ccid (rpm) - Generic USB CCID smart card reader driver
ccmakedep (1x) - create dependencies in makefiles using a C compiler
ccos (3) - complex cosine function
ccos (3p) - complex cosine functions
ccosf [ccos] (3) - complex cosine function
ccosf [ccos] (3p) - complex cosine functions
ccosh (3) - complex hyperbolic cosine
ccosh (3p) - complex hyperbolic cosine functions
ccoshf [ccosh] (3) - complex hyperbolic cosine
ccoshf [ccosh] (3p) - complex hyperbolic cosine functions
ccoshl [ccosh] (3) - complex hyperbolic cosine
ccoshl [ccosh] (3p) - complex hyperbolic cosine functions
ccosl [ccos] (3) - complex cosine function
ccosl [ccos] (3p) - complex cosine functions
cd (1p) - change the working directory
cd [builtins] (1) - bash built-in commands, see bash(1)
cdda2wav (1) - a sampling utility that dumps CD audio data into wav sound files
cdda2wav (rpm) - 用来从数码音频光盘中取样或复制 .wav 文件的工具。
cdparanoia-libs (rpm) - libcdda_paranoia (Paranoia III) 的库。
cdparanoia (Paranoia release III) [cdparanoia] (1) - an audio CD reading utility which includes extra data verification features
cdparanoia (rpm) - 一种光盘数码音频（CDDA）抽取工具（或称 ripper）。
cdrdao (1) - writes audio CD-Rs in disc-at-once mode
cdrdao (rpm) - 使用整盘 (DAO) 模式写入音频可录光盘。
cdrecord (1) - record audio or data Compact Disks or Digital Versatile Disks from a master
cdrecord (rpm) - 命令行式 CD/DVD 录制程序。
ceil (3) - ceiling function: smallest integral value not less than argument
ceil (3p) - ceiling value function
ceilf [ceil] (3) - ceiling function: smallest integral value not less than argument
ceilf [ceil] (3p) - ceiling value function
ceill [ceil] (3) - ceiling function: smallest integral value not less than argument
ceill [ceil] (3p) - ceiling value function
CellsOfScreen [BlackPixelOfScreen] (3x) - screen information functions and macros
cerf (3) - complex error function
cerfc [cerf] (3) - complex error function
cerfcf [cerf] (3) - complex error function
cerfcl [cerf] (3) - complex error function
cerff [cerf] (3) - complex error function
cerfl [cerf] (3) - complex error function
cexp2 (3) - base-2 exponent of a complex number
cexp2f [cexp2] (3) - base-2 exponent of a complex number
cexp2l [cexp2] (3) - base-2 exponent of a complex number
cexp (3) - complex exponential function
cexp (3p) - complex exponential functions
cexpf [cexp] (3) - complex exponential function
cexpf [cexp] (3p) - complex exponential functions
cexpl [cexp] (3) - complex exponential function
cexpl [cexp] (3p) - complex exponential functions
cfgetispeed (3p) - get input baud rate
cfgetispeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfgetospeed (3p) - get output baud rate
cfgetospeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
c++filt (1) - Demangle C++ and Java symbols
cflow (1p) - generate a C-language flowgraph (DEVELOPMENT)
cfmakeraw [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfree (3) - free allocated memory
cfsetispeed (3p) - set input baud rate
cfsetispeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfsetospeed (3p) - set output baud rate
cfsetospeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
cfsetspeed [termios] (3) - get and set terminal attributes, line control, get and set baud rate
CGI (3pm) - Simple Common Gateway Interface Class
CGI::Apache (3pm) - Backward compatibility module for CGI.pm
CGI::Carp (3pm) - CGI routines for writing to the HTTPD (or other) error log
CGI::Cookie (3pm) - Interface to Netscape Cookies
CGI::Fast (3pm) - CGI Interface for Fast CGI
CGI::Pretty (3pm) - module to produce nicely formatted HTML code
CGI::Push (3pm) - Simple Interface to Server Push
CGI::Switch (3pm) - Backward compatibility module for defunct CGI::Switch
CGI::Util (3pm) - Internal utilities used by CGI module
chacl (1) - change the access control list of a file or directory
chage (1) - change user password expiry information
charmap (5) - character symbols to define character encodings
charnames (3pm) - define character names for eN{named} string literal escapes
charsets (7) - programmer's view of character sets and internationalization
chat (8) - Automated conversational script with a modem
chattr (1) - change file attributes on a Linux second extended file system
chcat (8) - change file security category
chcon (1) - change security context
chdir (2) - change working directory
chdir (3p) - change working directory
chfn (1) - change your finger information
chgat [curs_attr] (3x) - curses character and window attribute control routines
chgrp (1) - change group ownership
chgrp (1p) - change the file group ownership
chips (4) - Chips and Technologies video driver
chkconfig (8) - updates and queries runlevel information for system services
chkconfig (rpm) - 用来维护 /etc/rc*.d 文件层次的系统工具。
chkfontpath (8) - simple interface for adding, removing, and listing directories in the X font server's path
chkfontpath (rpm) - 为 X 字体服务器编辑字体路径的简单界面。
chmod (1) - change file access permissions
chmod (1p) - change the file modes
chmod (2) - change permissions of a file
chmod (3p) - change mode of a file
chown (1) - change file owner and group
chown (1p) - change the file ownership
chown (2) - change ownership of a file
chown (3p) - change owner and group of a file
chpasswd (8) - update passwords in batch mode
chpasswd (8) - 成批更新用户的口令
chroot (1) - run command or interactive shell with special root directory
chroot (2) - change root directory
chrt (1) - manipulate real-time attributes of a process
chsh (1) - change your login shell
chvt (1) - change foreground virtual terminal
ci (1) - check in RCS revisions
cimag (3) - get imaginary part of a complex number
cimag (3p) - complex imaginary functions
cimagf [cimag] (3) - get imaginary part of a complex number
cimagf [cimag] (3p) - complex imaginary functions
cimagl [cimag] (3) - get imaginary part of a complex number
cimagl [cimag] (3p) - complex imaginary functions
ciphers (1ssl) - SSL cipher display and cipher list tool
ciptool (1) - Bluetooth Common ISDN Access Profile (CIP)
CIRCLEQ_ENTRY [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_HEAD [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INIT [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_AFTER [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_BEFORE [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_HEAD [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_INSERT_TAIL [queue] (3) - implementations of lists, tail queues, and circular queues
CIRCLEQ_REMOVE [queue] (3) - implementations of lists, tail queues, and circular queues
cirrus (4) - Cirrus Logic video driver
citron (4) - Citron Infrared Touch Driver (CiTouch)
cjpeg (1) - compress an image file to a JPEG file
cksum (1) - checksum and count the bytes in a file
cksum (1p) - write file checksums and sizes
classes.conf [classes] (5) - class configuration file for cups
classpathx-jaf-javadoc (rpm) - classpathx-jaf 的 Javadoc 文档
classpathx-jaf (rpm) - GNU JavaBeans(tm) 激活框架
classpathx-mail-javadoc (rpm) - classpathx-mail 的 Java
classpathx-mail (rpm) - GNU JavaMail(tm)
Class::Struct (3pm) - declare struct-like datatypes as Perl classes
cleanlinks (1x) - remove dangling symbolic links and empty directories
clear (1) - clear the terminal screen
clear [curs_clear] (3x) - clear all or part of a curses window
clearenv (3) - clear the environment
clearerr (3p) - clear indicators on a stream
clearerr [ferror] (3) - check and reset stream status
clearok [curs_outopts] (3x) - curses output options
client.conf [client] (5) - client configuration file for cups
ClientWhitePointOfCCC [DisplayOfCCC] (3x) - Color Conversion Context macros
clock (3) - Determine processor time
clock (3p) - report CPU time used
clockdiff (8) - measure clock difference between hosts
clock_getcpuclockid (3p) - access a process CPU-time clock (ADVANCED REALTIME)
clock_getres (2) - Get the resolution of any clock
clock_getres (3) - clock and time functions
clock_getres [clock_gettime] (3p) - clock and timer functions (REALTIME)
clock_gettime (2) - Return the current timespec value of tp for the specified clock
clock_gettime (3p) - clock and timer functions (REALTIME)
clock_gettime [clock_getres] (3) - clock and time functions
clock_nanosleep (2) - Suspend execution of the currently running thread
clock_nanosleep (3p) - high resolution sleep with specifiable clock (ADVANCED REALTIME)
clock_settime (2) - Set the specified clock
clock_settime [clock_getres] (3) - clock and time functions
clock_settime [clock_gettime] (3p) - clock and timer functions (REALTIME)
clog10 (3) - base-10 logarithm of a complex number
clog10f [clog10] (3) - base-10 logarithm of a complex number
clog10l [clog10] (3) - base-10 logarithm of a complex number
clog2 (3) - base-2 logarithm of a complex number
clog2f [clog2] (3) - base-2 logarithm of a complex number
clog2l [clog2] (3) - base-2 logarithm of a complex number
clog (3) - natural logarithm of a complex number
clog (3p) - complex natural logarithm functions
clogf [clog] (3) - natural logarithm of a complex number
clogf [clog] (3p) - complex natural logarithm functions
clogl [clog] (3) - natural logarithm of a complex number
clogl [clog] (3p) - complex natural logarithm functions
clone2 [clone] (2) - create a child process
clone (2) - create a child process
close (2) - close a file descriptor
close (3p) - close a file descriptor
closedir (3) - close a directory
closedir (3p) - close a directory stream
closelog [syslog] (3p) - control system log
closelog [syslog] (3) - send messages to the system logger
clrtobot [curs_clear] (3x) - clear all or part of a curses window
clrtoeol [curs_clear] (3x) - clear all or part of a curses window
cluck [Carp] (3pm) - warn of errors with stack backtrace (not exported by default)
cmp (1) - compare two files
cmp (1p) - compare two files
CMSG_ALIGN [cmsg] (3) - Access ancillary data
CMSG_FIRSTHDR [cmsg] (3) - Access ancillary data
CMSG_NXTHDR [cmsg] (3) - Access ancillary data
CMSG_SPACE [cmsg] (3) - Access ancillary data
cmuwmtopbm (1) - convert a CMU window manager bitmap into a PBM image
co (1) - check out RCS revisions
col (1) - filter reverse line feeds from input
colcrt (1) - filter nroff output for CRT previewing
colon (1p) - null utility
color_content [curs_color] (3x) - curses color manipulation routines
COLOR_PAIR [curs_color] (3x) - curses color manipulation routines
color_set [curs_attr] (3x) - curses character and window attribute control routines
colrm (1) - remove columns from a file
column (1) - columnate lists
combinediff (1) - create a cumulative unified patch from two incremental patches
com_err (3) - common error display routine
comm (1) - compare two sorted files line by line
comm (1p) - select or reject lines common to two files
command (1p) - execute a simple command
command [builtins] (1) - bash built-in commands, see bash(1)
compare (1) - mathematically and visually annotate the difference between an image and its reconstruction
compat-libgcc-296 (rpm) - 兼容 2.96-RH libgcc 程序
compat-libstdc++-296 (rpm) - 兼容的 2.96-RH 标准 C++ 库
compat-libstdc++-33 (rpm) - 兼容的标准 C++ 库
compgen [builtins] (1) - bash built-in commands, see bash(1)
compile_et (1) - error table compiler
complete [builtins] (1) - bash built-in commands, see bash(1)
complex (7) - basics of complex mathematics
complex.h [complex] (0p) - complex arithmetic
composite (1) - overlaps one image over another
Compress::Zlib (3pm) - Interface to zlib compression library
comps-extras (rpm) - 组件的图像以及用于 comps 文件的工具
confess [Carp] (3pm) - die of errors with stack backtrace
Config (3pm) - access Perl configuration information
config (5ssl) - OpenSSL CONF library configuration files
config.guess [config] (1) - guess the build system triplet
config.sub [config] (1) - validate and canonicalize a configuration triplet
config-util (5) - Common PAM configuration file for configuration utilities
CONF_modules_free (3ssl) - OpenSSL configuration cleanup functions
CONF_modules_load [CONF_modules_free] (3ssl) - OpenSSL configuration cleanup functions
CONF_modules_load [CONF_modules_load_file] (3ssl) - OpenSSL configuration functions
CONF_modules_load_file (3ssl) - OpenSSL configuration functions
CONF_modules_unload [CONF_modules_free] (3ssl) - OpenSSL configuration cleanup functions
confstr (3) - get configuration dependent string variables
confstr (3p) - get configurable variables
conj (3) - calculate the complex conjugate
conj (3p) - complex conjugate functions
conjf [conj] (3) - calculate the complex conjugate
conjf [conj] (3p) - complex conjugate functions
conjl [conj] (3) - calculate the complex conjugate
conjl [conj] (3p) - complex conjugate functions
conjure (1) - interprets and executes scripts written in the Magick Scripting Language (MSL)
connect (2) - initiate a connection on a socket
connect (3p) - connect a socket
ConnectionNumber [AllPlanes] (3x) - Display macros and functions
console.apps [console] (5) - specify console - accessible privileged applications
console_codes (4) - Linux console escape and control sequences
console.handlers [console] (5) - file specifying handlers of console lock and unlock events
consolehelper (8) - A wrapper that helps console users run system programs
console ioctl [console_ioctl] (4) - ioctl's for console terminal and virtual consoles
console.perms [console] (5) - permissions control file for users at the system console
consoletype (1) - print type of the console connected to standard input
constant (3pm) - Perl pragma to declare constants
context_free [context_new] (3) - Routines to manipulate SELinux security contexts
context_new (3) - Routines to manipulate SELinux security contexts
context_range_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_range_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_role_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_role_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_str [context_new] (3) - Routines to manipulate SELinux security contexts
context_type_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_type_set [context_new] (3) - Routines to manipulate SELinux security contexts
context_user_get [context_new] (3) - Routines to manipulate SELinux security contexts
context_user_set [context_new] (3) - Routines to manipulate SELinux security contexts
continue (1p) - continue for, while, or until loop
continue [builtins] (1) - bash built-in commands, see bash(1)
convert (1) - convert between image formats as well as resize an image, blur, crop, despeckle, dither, draw on, flip, join, re-sample, and much more
convertquota (8) - convert quota from old file format to new one
coolkey-devel (rpm) - CoolKey Applet libraries
coolkey (rpm) - CoolKey PKCS #11 module
C operator [operator] (7) - C operator precedence and order of evaluation
copysign (3) - copy sign of a number
copysign (3p) - number manipulation function
copysignf [copysign] (3) - copy sign of a number
copysignf [copysign] (3p) - number manipulation function
copysignl [copysign] (3) - copy sign of a number
copysignl [copysign] (3p) - number manipulation function
copywin [curs_overlay] (3x) - overlay and manipulate overlapped curses windows
core (5) - core dump file
coreutils (rpm) - GNU 核心工具：一组 shell 脚本常用的工具
cos (3) - cosine function
cos (3p) - cosine function
cosf [cos] (3) - cosine function
cosf [cos] (3p) - cosine function
cosh (3) - hyperbolic cosine function
cosh (3p) - hyperbolic cosine functions
coshf [cosh] (3) - hyperbolic cosine function
coshf [cosh] (3p) - hyperbolic cosine functions
coshl [cosh] (3) - hyperbolic cosine function
coshl [cosh] (3p) - hyperbolic cosine functions
cosl [cos] (3) - cosine function
cosl [cos] (3p) - cosine function
cp (1) - copy files and directories
cp (1p) - copy files
cpan (1) - easily interact with CPAN from the command line
CPAN (3pm) - query, download and build perl modules from CPAN sites
CPAN::FirstTime (3pm) - Utility for CPAN::Config file Initialization
CPAN::Nox (3pm) - Wrapper around CPAN.pm without using any XS module
cpio (1) - copy files to and from archives
cpio.h [cpio] (0p) - cpio archive values
cpio (rpm) - GNU 归档程序。
cpow (3) - complex power function
cpow (3p) - complex power functions
cpowf [cpow] (3) - complex power function
cpowf [cpow] (3p) - complex power functions
cpowl [cpow] (3) - complex power function
cpowl [cpow] (3p) - complex power functions
cpp (1) - The C Preprocessor
cpp (rpm) - C 预处理器。
cproj (3p) - complex projection functions
cproj (3) - project into Riemann Sphere
cprojf [cproj] (3p) - complex projection functions
cprojf [cproj] (3) - project into Riemann Sphere
cprojl [cproj] (3p) - complex projection functions
cprojl [cproj] (3) - project into Riemann Sphere
CPU_CLR [sched_setaffinity] (2) - set and get a process's CPU affinity mask
CPU_ISSET [sched_setaffinity] (2) - set and get a process's CPU affinity mask
CPU_SET [sched_setaffinity] (2) - set and get a process's CPU affinity mask
cpuspeed (rpm) - CPU 频率调节程序
CPU_ZERO [sched_setaffinity] (2) - set and get a process's CPU affinity mask
cracklib-dicts (rpm) - 标准 CrackLib 词典。
cracklib (rpm) - 口令检查库。
crash (8) - Analyze Linux crash data or a live system
crash (rpm) - 系统崩溃处理工具；netdump, diskdump, LKCD 或 mcore dumpfiles
creal (3) - get real part of a complex number
creal (3p) - complex real functions
crealf [creal] (3) - get real part of a complex number
crealf [creal] (3p) - complex real functions
creall [creal] (3) - get real part of a complex number
creall [creal] (3p) - complex real functions
creat (3p) - create a new file or rewrite an existing one
create_module (2) - create a loadable module entry
creat [open] (2) - open and possibly create a file or device
crl (1ssl) - CRL utility
crl2pkcs7 (1ssl) - Create a PKCS#7 structure from a CRL and certificates
croak [Carp] (3pm) - die of errors (from perspective of caller)
cron (8) - daemon to execute scheduled commands (ISC Cron V4.1)
crontab (1) - maintain crontab files for individual users (ISC Cron V4.1)
crontab (1p) - schedule periodic background work
crontab (5) - tables for driving cron (ISC Cron V4.1)
crontabs (rpm) - 用来调度程序执行的根 crontab 文件。
crypt (3) - password and data encryption
crypt (3p) - string encoding function (CRYPT)
cryptix-asn1-javadoc (rpm) - cryptix-asnl 的 Java 文档
cryptix-javadoc (rpm) - cryptix 的 Java 文档
crypto (3ssl) - OpenSSL cryptographic library
CRYPTO_destroy_dynlockid [threads] (3ssl) - OpenSSL thread support
CRYPTO_get_ex_data [CRYPTO_set_ex_data] (3ssl) - internal application specific data functions
CRYPTO_get_new_dynlockid [threads] (3ssl) - OpenSSL thread support
CRYPTO_lock [threads] (3ssl) - OpenSSL thread support
CRYPTO_num_locks [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_create_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_destroy_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_dynlock_lock_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_ex_data (3ssl) - internal application specific data functions
CRYPTO_set_id_callback [threads] (3ssl) - OpenSSL thread support
CRYPTO_set_locking_callback [threads] (3ssl) - OpenSSL thread support
cryptsetup (8) - setup cryptographic volumes for dm-crypt (including LUKS extension)
cryptsetup-luks (rpm) - 设置加密文件系统的工具。
cscope (1) - interactively examine a C program
cscope (rpm) - C 源代码树查找和浏览工具。
csin (3) - complex sine function
csin (3p) - complex sine functions
csinf [csin] (3) - complex sine function
csinf [csin] (3p) - complex sine functions
csinh (3) - complex hyperbolic sine
csinh (3p) - complex hyperbolic sine functions
csinhf [csinh] (3) - complex hyperbolic sine
csinhf [csinh] (3p) - complex hyperbolic sine functions
csinhl [csinh] (3) - complex hyperbolic sine
csinhl [csinh] (3p) - complex hyperbolic sine functions
csinl [csin] (3) - complex sine function
csinl [csin] (3p) - complex sine functions
csplit (1p) - split files based on context
csplit (1) - split a file into sections determined by context lines
csqrt (3) - complex square root
csqrt (3p) - complex square root functions
csqrtf [csqrt] (3) - complex square root
csqrtf [csqrt] (3p) - complex square root functions
csqrtl [csqrt] (3) - complex square root
csqrtl [csqrt] (3p) - complex square root functions
ctags (1) - Generate tag files for source code
ctags (1p) - create a tags file (DEVELOPMENT, FORTRAN)
ctags (rpm) - C 编程语言索引和(或)交叉参考工具。
ctan (3) - complex tangent function
ctan (3p) - complex tangent functions
ctanf [ctan] (3) - complex tangent function
ctanf [ctan] (3p) - complex tangent functions
ctanh (3) - complex hyperbolic tangent
ctanh (3p) - complex hyperbolic tangent functions
ctanhf [ctanh] (3) - complex hyperbolic tangent
ctanhf [ctanh] (3p) - complex hyperbolic tangent functions
ctanhl [ctanh] (3) - complex hyperbolic tangent
ctanhl [ctanh] (3p) - complex hyperbolic tangent functions
ctanl [ctan] (3) - complex tangent function
ctanl [ctan] (3p) - complex tangent functions
ctermid (3) - get controlling terminal name
ctermid (3p) - generate a pathname for the controlling terminal
ctime (3p) - convert a time value to a date and time string
ctime (3) - transform date and time to broken-down time or ASCII
ctime_r [ctime] (3p) - convert a time value to a date and time string
ctime_r [ctime] (3) - transform date and time to broken-down time or ASCII
ctrlaltdel (8) - set the function of the Ctrl-Alt-Del combination
ctype.h [ctype] (0p) - character types
cue2toc (1) - convert CUE to TOC format
cupsaddsmb (8) - export printers to samba for windows clients
cups-config (1) - get cups api, compiler, directory, and link information
cupsd (8) - common unix printing system daemon
cupsd.conf [cupsd] (5) - server configuration file for cups
cups-deviced (8) - cups device daemon
cupsdisable [cupsenable] (8) - stop/start printers and classes
cups-driverd (8) - cups driver daemon
cupsenable (8) - stop/start printers and classes
cups-libs (rpm) - 通用 Unix 打印系统 ―库
cups-lpd (8) - receive print jobs and report printer status to lpd clients
cups-polld (8) - cups printer polling daemon
cups (rpm) - 通用 Unix 打印系统
cupstestdsc (1) - test conformance of postscript files
cupstestppd (1) - test conformance of ppd files
curl (1) - transfer a URL
curl-config (1) - Get information about a libcurl installation
curl-devel (rpm) - 用 libcurl 建构程序所需的文件。
curl_easy_cleanup (3) - End a libcurl easy session
curl_easy_duphandle (3) - Clone a libcurl session handle
curl_easy_escape (3) - URL encodes the given string
curl_easy_getinfo (3) - extract information from a curl handle
curl_easy_init (3) - Start a libcurl easy session
curl_easy_perform (3) - Perform a file transfer
curl_easy_reset (3) - reset all options of a libcurl session handle
curl_easy_setopt (3) - set options for a curl easy handle
curl_easy_strerror (3) - return string describing error code
curl_easy_unescape (3) - URL decodes the given string
curl_escape (3) - URL encodes the given string
curl_formadd (3) - add a section to a multipart/formdata HTTP POST
curl_formfree (3) - free a previously build multipart/formdata HTTP POST chain
curl_formget (3) - serialize a previously build multipart/formdata HTTP POST chain
curl_free (3) - reclaim memory that has been obtained through a libcurl call
curl_getdate (3) - Convert an date string to number of seconds since January 1, 1970
curl_getenv (3) - return value for environment name
curl_global_cleanup (3) - global libcurl cleanup
curl_global_init (3) - Global libcurl initialisation
curl_global_init_mem (3) - Global libcurl initialisation with memory callbacks
curl_maprintf [curl_mprintf] (3) - formatted output conversion
curl_mfprintf [curl_mprintf] (3) - formatted output conversion
curl_mprintf (3) - formatted output conversion
curl_msnprintf [curl_mprintf] (3) - formatted output conversion
curl_msprintf curl_mvaprintf [curl_mprintf] (3) - formatted output conversion
curl_multi_add_handle (3) - add an easy handle to a multi session
curl_multi_assign (3) - set data to associated with an internal socket
curl_multi_cleanup (3) - close down a multi session
curl_multi_fdset (3) - extracts file descriptor information from a multi handle
curl_multi_info_read (3) - read multi stack informationals
curl_multi_init (3) - create a multi handle
curl_multi_perform (3) - reads/writes available data from each easy handle
curl_multi_remove_handle (3) - remove an easy handle from a multi session
curl_multi_setopt (3) - set options for a curl multi handle
curl_multi_socket (3) - reads/writes available data
curl_multi_strerror (3) - return string describing error code
curl_multi_timeout (3) - how long to wait for action before proceeding
curl_mvfprintf [curl_mprintf] (3) - formatted output conversion
curl_mvprintf [curl_mprintf] (3) - formatted output conversion
curl_mvsnprintf [curl_mprintf] (3) - formatted output conversion
curl_mvsprintf [curl_mprintf] (3) - formatted output conversion
curl (rpm) - 从远程服务器（FTP、HTTP、及其它）中获取文件的工具。
curl_share_cleanup (3) - Clean up a shared object
curl_share_init (3) - Create a shared object
curl_share_setopt (3) - Set options for a shared object
curl_share_strerror (3) - return string describing error code
curl_slist_append (3) - add a string to an slist
curl_slist_free_all (3) - free an entire curl_slist list
curl_strequal (3) - case insensitive string comparisons
curl_strnequal [curl_strequal] (3) - case insensitive string comparisons
curl_unescape (3) - URL decodes the given string
curl_version (3) - returns the libcurl version string
curl_version_info (3) - returns run-time libcurl version info
curses_version [curs_extend] (3x) - miscellaneous curses extensions
curs_set [curs_kernel] (3x) - low-level curses routines
cuserid [getlogin] (3) - get user name
cut (1p) - cut out selected fields of each line of a file
cut (1) - remove sections from each line of files
cvs (1) - Concurrent Versions System
cvs (5) - Concurrent Versions System support files
cvsbug (8) - send problem report (PR) about CVS to a central support site
cvs (rpm) - 版本控制系统。
cvt (1) - calculate VESA CVT mode lines
Cwd (3pm) - get pathname of current working directory
cxpm (1x) - Check an XPM (X PixMap) file - XPM 1, 2, or 3
cxref (1p) - generate a C-language program cross-reference table (DEVELOPMENT)
cyrix (4) - Cyrix video driver
cyrus-sasl-devel (rpm) - 用 Cyrus SASL 开发程序所需的文件。
cyrus-sasl-lib (rpm) - 使用 Cyrus SASL 的应用程序需要的共享库。
cyrus-sasl-plain (rpm) - Cyrus SASL 的 PLAIN 和 LOGIN 支持。
cyrus-sasl (rpm) - Cyrus SASL 库。
cytune (8) - Tune Cyclades driver parameters
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