做淘宝客网站性质,做网站网站被抓没盈利,什么软件可以做app,网站推广的具体方案2019独角兽企业重金招聘Python工程师标准 10月16日任务 9.1 正则介绍_grep上 9.2 grep中 9.3 grep下 grep基本用法 grep [-cinvABC] word filename centos7.x版本的grep实则为grep --colorauto-c 显示匹配到的行数[rootlocalhost ~]# cp /etc/passwd /tmp
[rootl… 2019独角兽企业重金招聘Python工程师标准 10月16日任务 9.1 正则介绍_grep上 9.2 grep中 9.3 grep下 grep基本用法 grep [-cinvABC] word filename centos7.x版本的grep实则为grep --colorauto-c 显示匹配到的行数[rootlocalhost ~]# cp /etc/passwd /tmp
[rootlocalhost ~]# cd /tmp
[rootlocalhost tmp]# [rootcentos7 tmp]# grep -c root passwd
2-i 忽略大小写[rootcentos7 tmp]# grep -i castiel passwd
castiel:x:1000:1000::/home/castiel:/bin/bash
Castiel:X:1000:1000::/home/castiel:/bin/bash-n 显示匹配行的同时显示行号[rootcentos7 tmp]# grep -n root passwd
1:root:x:0:0:root:/root:/bin/bash
10:operator:x:11:0:operator:/root:/sbin/nologin-v 对匹配信息取反[rootcentos7 tmp]# grep -iv castiel passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
.....-r 递归匹配过滤对目录进行操作[rootcentos7 tmp]# grep -r root /etc
/etc/pki/ca-trust/ca-legacy.conf:# The upstream Mozilla.org project tests all changes to the root CA
/etc/pki/ca-trust/ca-legacy.conf:# to temporarily keep certain (legacy) root CA certificates trusted,
/etc/pki/ca-trust/ca-legacy.conf:# It may keep root CA certificate as trusted, which the upstream
/etc/pki/ca-trust/extracted/README:root CA certificates.
/etc/pki/ca-trust/extracted/java/README:root CA certificates.
匹配到二进制文件 /etc/pki/ca-trust/extracted/java/cacerts
/etc/pki/ca-trust/extracted/openssl/README:root CA certificates.
/etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt:# Comodo AAA Services root
/etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt:# Comodo Secure Services root
/etc/pki/ca-trust/extracted/openssl/ca-bundle.trust.crt:# Comodo Trusted Services root -An(after) 显示匹配行及其后n行[rootcentos7 tmp]# grep -A2 root passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
--
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin-Bn(before) 显示匹配行及其前n行[rootcentos7 tmp]# grep -B2 root passwd
root:x:0:0:root:/root:/bin/bash
--
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin-Cn 显示匹配行及其前后n行[rootcentos7 tmp]# grep -C2 root passwd
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
--
halt:x:7:0:halt:/sbin:/sbin/halt
mail:x:8:12:mail:/var/spool/mail:/sbin/nologin
operator:x:11:0:operator:/root:/sbin/nologin
games:x:12:100:games:/usr/games:/sbin/nologin
ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin正则 # 测试内容
[rootlocalhost ~]# cat test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
111111111111111111111111111111aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
#abcskhd数字 [0-9][rootlocalhost ~]# grep [0-9] test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
111111111111111111111111111111字母 [a-zA-Z][rootlocalhost ~]# grep [a-zA-Z] test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
#abcskhd取反 [^] (在方括号内才表示取反)[rootlocalhost ~]# grep [^a-zA-Z] test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin
111111111111111111111111111111
#abcskhd开头 ^[rootlocalhost ~]# grep ^# test.txt
#abcskhd结尾 $[rootlocalhost ~]# grep in$ test.txt
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin匹配任意1个字符 .[rootlocalhost ~]# grep b.n test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin匹配0或多个之前的一个字符 *[rootlocalhost ~]# grep a*m test.txt
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin扩展正则grep -E 或 egrep 匹配1或多个之前的一个字符 [rootlocalhost ~]# grep -E rot test.txt
root:x:0:0:root:/root:/bin/bash匹配花括号之前那个字符的个数 {n} 或 {n, m}[rootlocalhost ~]# grep -E o{2} test.txt
root:x:0:0:root:/root:/bin/bash
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin[rootlocalhost ~]# grep -E o{1,2} test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin匹配0或1个之前的字符 ?# 匹配0或1个字符o
[rootlocalhost ~]# grep -E oo? test.txt
root:x:0:0:root:/root:/bin/bash
bin:x:1:1:bin:/bin:/sbin/nologin
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin
lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin匹配其中之一个表达式|[rootlocalhost ~]# grep -E 111|aaa test.txt
111111111111111111111111111111
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa实用grep实例 过滤注释行 grep -v ^#过滤空行 grep -v ^$过滤手机号 grep -E 86-[0-9]{11}[rootcentos7 tmp]# echo 86-15301203401 | grep -E 86-[0-9]{11}
86-15301203401过滤邮箱 grep -E \.\*\.\*\.\.\*[rootcentos7 tmp]# echo 12ab3#123qq.com | grep -E .*.*\..*
12ab3#123qq.com
[rootcentos7 tmp]# echo 12323163.com | grep -E .*.*\..*
12323163.com过滤出/etc目录下包含root字符的所有的.conf文件内的行--include[rootcentos7 tmp]# grep -r --include*.conf root /etc
/etc/pki/ca-trust/ca-legacy.conf:# The upstream Mozilla.org project tests all changes to the root CA
/etc/pki/ca-trust/ca-legacy.conf:# to temporarily keep certain (legacy) root CA certificates trusted,
/etc/pki/ca-trust/ca-legacy.conf:# It may keep root CA certificate as trusted, which the upstream
/etc/yum/pluginconf.d/fastestmirror.conf:# as root).
/etc/selinux/semanage.conf:ignoredirs/root
/etc/dbus-1/system.d/teamd.conf: policy userroot
/etc/dbus-1/system.d/org.freedesktop.hostname1.conf: policy userroot
/etc/dbus-1/system.d/org.freedesktop.import1.conf: policy userroot
/etc/dbus-1/system.d/org.freedesktop.locale1.conf: policy userroot
......扩展正则 ( ) 的应用[rootlocalhost ~]# grep -E a(e|d)m test.txt
daemon:x:2:2:daemon:/sbin:/sbin/nologin
adm:x:3:4:adm:/var/adm:/sbin/nologin 转载于:https://my.oschina.net/u/3964535/blog/2246817