Linux09

 

 答案：

1.

[root@huangyanjin ~]# grep 'boot' /root/initial-setup-ks.cfg | wc -l
6
[root@huangyanjin ~]# grep -c 'boot' initial-setup-ks.cfg
6
[root@huangyanjin ~]#

2.

[root@huangyanjin ~]# grep -n 'boot' initial-setup-ks.cfg
3:xconfig --startxonboot
12:# Run the Setup Agent on first boot
13:firstboot --enable
23:network --bootproto=dhcp --device=ens32 --onboot=off --ipv6=auto --no-activate
33:# System bootloader configuration
34:bootloader --append=" crashkernel=auto" --location=mbr --boot-drive=sda
[root@huangyanjin ~]#

3.

[root@huangyanjin ~]# ps aux > /root/ps.log
[root@huangyanjin ~]# more ps.log

[root@huangyanjin ~]# grep '2508' ps.log
[root@huangyanjin ~]# grep '2598' ps.log

4.

[root@huangyanjin ~]# grep '[0-9][0-9][0-9]2' /root/ps.log

5.find .

find . ! -type d

6.

[root@huangyanjin yum.repos.d]# find / -user harry -type f
find: ‘/proc/3888/task/3888/fdinfo/5’: No such file or directory
find: ‘/proc/3888/fdinfo/6’: No such file or directory
/var/spool/mail/harry
/home/harry/.bash_logout
/home/harry/.bash_profile
/home/harry/.bashrc
[root@huangyanjin yum.repos.d]# mkdir /root/finder
[root@huangyanjin yum.repos.d]# find / -user harry -type f -exec cp {} /root/finder/ \;
find: ‘/proc/4091/task/4091/fdinfo/5’: No such file or directory
find: ‘/proc/4091/fdinfo/6’: No such file or directory
[root@huangyanjin yum.repos.d]# find / -user harry -type f -exec cp {} /root/finder/ \; 2> /dev/null
[root@huangyanjin yum.repos.d]#

7.

find / -newer a.txt(文件必须写绝对路径) ! -newer b.txt -exec ls -lh {} \;

8.

[root@huangyanjin yum.repos.d]# wc -l /etc/passwd
45 /etc/passwd

 

 

 

 

 

 

 

 

10.

[root@huangyanjin ~]# mkdir /mnt/cdrom

[root@huangyanjin ~]# mount /dev/cdrom
mount: /dev/sr0 is already mounted or /run/media/root/RHEL-7.7 Server.x86_64 busy
/dev/sr0 is already mounted on /run/media/root/RHEL-7.7 Server.x86_64
[root@huangyanjin ~]# mount /dev/cdrom /mnt/cdrom
mount: /dev/sr0 is write-protected, mounting read-only
[root@huangyanjin ~]# cd /etc/yum.repos.d/
[root@huangyanjin yum.repos.d]# ls
dvd.repo redhat.repo
[root@huangyanjin yum.repos.d]# rm -rf *
[root@huangyanjin yum.repos.d]# vim dvd.repo^C
[root@huangyanjin yum.repos.d]#

[root@huangyanjin yum.repos.d]# vim dvd.repo
[root@huangyanjin yum.repos.d]# cat dvd.repo
[dvd]
name = dvd
baseurl = file:///mnt/cdrom
gpgcheck = 0
enabled = 1
[root@huangyanjin yum.repos.d]#

[root@huangyanjin yum.repos.d]# yum repolist all