Name: Grep 用法
Item: Grep 用法
Author: ptaletosci

Main » » Grep 用法

1:14 PM Grep 用法
Grep : g (globally) search for a re (regular expression ) and p (print ) the results. 1、参数： -I ：忽略大小写 -c ：打印匹配的行数 -l ：从多个文件中查找包含匹配项 -v ：查找不包含匹配项的行 -n：打印包含匹配项的行和行标 2、RE（正则表达式） \ 忽略正则表达式中特殊字符的原有含义 ^ 匹配正则表达式的开始行 $ 匹配正则表达式的结束行 \< 从匹配正则表达式的行开始 \>; 到匹配正则表达式的行结束 [ ] 单个字符；如[A] 即A符合要求 [ - ] 范围；如[A-Z]即A，B，C一直到Z都符合要求 . 所有的单个字符 * 所有字符，长度可以为0 3、举例 # ps -ef \| grep in.telnetd root 19955 181 0 13:43:53 ? 0:00 in.telnetd # more size.txt size文件的内容 b124230 b034325 a081016 m7187998 m7282064 a022021 a061048 m9324822 b103303 a013386 b044525 m8987131 B081016 M45678 B103303 BADc2345 # more size.txt \| grep '[a-b]' 范围；如[A-Z]即A，B，C一直到Z都符合要求 b124230 b034325 a081016 a022021 a061048 b103303 a013386 b044525 # more size.txt \| grep '[a-b]'* b124230 b034325 a081016 m7187998 m7282064 a022021 a061048 m9324822 b103303 a013386 b044525 m8987131 B081016 M45678 B103303 BADc2345 # more size.txt \| grep '' 单个字符；如[A] 即A符合要求 b124230 b034325 b103303 b044525 # more size.txt \| grep '[bB]' b124230 b034325 b103303 b044525 B081016 B103303 BADc2345 # grep 'root' /etc/group root::0:root bin::2:root,bin,daemon sys::3:root,bin,sys,adm adm::4:root,adm,daemon uucp::5:root,uucp mail::6:root tty::7:root,tty,adm lp::8:root,lp,adm nuucp::9:root,nuucp daemon::12:root,daemon # grep '^root' /etc/group 匹配正则表达式的开始行 root::0:root # grep 'uucp' /etc/group uucp::5:root,uucp nuucp::9:root,nuucp # grep '\<uucp' /etc/group uucp::5:root,uucp # grep 'root$' /etc/group 匹配正则表达式的结束行 root::0:root mail::6:root # more size.txt \| grep -i 'b1..3' -i ：忽略大小写 b124230 b103303 B103303 # more size.txt \| grep -iv 'b1..3' -v ：查找不包含匹配项的行 b034325 a081016 m7187998 m7282064 a022021 a061048 m9324822 a013386 b044525 m8987131 B081016 M45678 BADc2345 # more size.txt \| grep -in 'b1..3' 1:b124230 9:b103303 15:B103303 # grep '$' /etc/init.d/nfs.server \| wc -l 128 # grep '\$' /etc/init.d/nfs.server \| wc –l 忽略正则表达式中特殊字符的原有含义 15 # grep '\$' /etc/init.d/nfs.server case "$1" in >;/tmp/sharetab.$$ [ "x$fstype" != xnfs ] && \ echo "$path\t$res\t$fstype\t$opts\t$desc" \ >;>;/tmp/sharetab.$$ /usr/bin/touch -r /etc/dfs/sharetab /tmp/sharetab.$$ /usr/bin/mv -f /tmp/sharetab.$$ /etc/dfs/sharetab if [ -f /etc/dfs/dfstab ] && /usr/bin/egrep -v '^[ ](#\|$)' \ if [ $startnfsd -eq 0 -a -f /etc/rmmount.conf ] && \ if [ $startnfsd -ne 0 ]; then elif [ ! -n "$_INIT_RUN_LEVEL" ]; then while [ $wtime -gt 0 ]; do wtime=`expr $wtime - 1` if [ $wtime -eq 0 ]; then echo "Usage: $0 { start \| stop }" # more size.txt the test file their are files The end # grep 'the' size.txt the test file their are files # grep '\<the' size.txt the test file their are files # grep 'the\>;' size.txt the test file # grep '\<the\>;' size.txt the test file # grep '\<[Tt]he\>;' size.txt the test file The end
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