grep [选项] 字符串 文件名

在文件当中匹配符合条件的字符串

选项：

-i 忽略大小写

-v 排除指定字符串

[root@localhost ~]# grep "work" anaconda-ks.cfg 

# Network information

network  --bootproto=dhcp --device=ens33 --onboot=off --ipv6=auto --no-activate

network  --hostname=localhost.localdomain

[root@localhost ~]# 

我们可以找到anaconda-ks.cfg 文件中含有"work"字符串的行

[root@localhost ~]# grep -v  "work" anaconda-ks.cfg 

#version=DEVEL

#sdfsddsd

 System authorization information

auth --enableshadow --passalgo=sha512

# Use CDROM installation media

cdrom

# Use graphical install

graphical

# Run the Setup Agent on first boot

firstboot --enable

# Keyboard layouts

keyboard --vckeymap=cn --xlayouts='cn'

# System language

lang zh_CN.UTF-8

# Root password

rootpw --iscrypted $6$G7eVijyXAp8DMSXi$bKh/vjEbEdH.4WmgXjhpw08/jYzjGDgaTnc8ZNFfUREgFX0Kepz39OwQsjhlFBaYUPwUUuI.RcsCAgkqrWeSJ1

# System services

services --disabled="chronyd"

# System timezone

timezone Asia/Shanghai --isUtc --nontp

# System bootloader configuration

bootloader --append=" crashkernel=auto" --location=mbr --boot-drive=sda

autopart --type=lvm

# Partition clearing information

clearpart --none --initlabel

%packages

@^minimal

@core

kexec-tools

%end

%addon com_redhat_kdump --enable --reserve-mb='auto'

%end

%anaconda

pwpolicy root --minlen=6 --minquality=50 --notstrict --nochanges --notempty

pwpolicy user --minlen=6 --minquality=50 --notstrict --nochanges --notempty

pwpolicy luks --minlen=6 --minquality=50 --notstrict --nochanges --notempty

%end

[root@localhost ~]# 

加了 -v 就查找不包含"work"的行；