有趣的linux命令

一、pv

1.pv命令

pv命令 Pipe Viewer 的简称，由Andrew Wood 开发。意思是通过管道显示数据处理进度的信息。这些信息包括已经耗费的时间，完成的百分比(通过进度条显示)，当前的速度，全部传输的数据，以及估计剩余的时间

 

2.安装命令

debain系列操作系统，如ubuntu则用
sudo apt-get install pv

rehat系列操作系统，如centos则用

yum apt-get install pv

 

3.语法

pv  [option]  file....

 

4.参数

-p, --progress show progress bar

-t,--timer show elapsed time

-e, --eta show estimated time of arrival (completion)

-I, --fineta show absolute estimated time of arrival (completion)

-r, --rate show data transfer rate counter

-a, --average-rate show data transfer average rate counter

-b, --bytes show number of bytes transferred

-T, --buffer-percent show percentage of transfer buffer in use

-A, --last-written NUM show NUM bytes last written

-F, --format FORMAT set output format to FORMAT

-n, --numeric 输出百分比

-q, --quiet do not output any transfer information at all

-W, --wait display nothing until first byte transferred

-D, --delay-start SEC display nothing until SEC seconds have passed

-s, --size SIZE set estimated data size to SIZE bytes

-l, --line-mode count lines instead of bytes

-0, --null lines are null-terminated

-i, --interval SEC update every SEC seconds

-w, --width WIDTH assume terminalis WIDTH characters wide

-H, --height HEIGHT assume terminal is HEIGHT rows high

-N, --name NAME prefix visual information with NAME

-f, --force output even if standard error is not a terminal

-c, --cursor use cursor positioning escape sequences

-L, --rate-limit RATE limit transfer to RATE bytes per second

-B, --buffer-size BYTES use a buffer size of BYTES

-C, --no-splice never use splice(), always use read/write

-E, --skip-errors skip read errors in input

-S, --stop-at-size stop after --size bytes have been transferred

-R, --remote PID update settings of process PID

-P, --pidfile FILE save process ID in FILE

-d, --watchfd PID[:FD] watch file FD opened by process PID

-h, --help 显示帮助

-V, --version 显示版本信息

 

4.实例

二、banner

 1.banner命令

输出图形化字符的命令：banner

 

2.安装

$ sudo apt-get update
$ sudo apt-get install sysvbanner

 

3.使用

banner csm