sed用法介绍
输出第1行到第3行
输出第2行
查找含有tomotoboy的行让后输出
输出当前的所有用户
输出第一行到含有字符串tomotoboy的行
输出原文的同时，输出tomotoboy所在的行号
输出含有tomotoboy的行的行号
输出第一行到最后一行
输出最后一行
append.sed：sed脚本实现附加功能，将hello tomotoboy附件在tomotoboy所在行之后
文本输出时，把tomotoboy替换成hello
只输出被替换的行
如果要附加或修改一个字符串，可以使用（&）命令，&命令保存发现模式以便重新调用它，然后把它放在替换字符串里面。
看看我们写好了哪些sed脚本
看看change.sed的用途是什么？
找到tomotoboy，替换为I love China,Ilove Wanzhi.
-bash-3.00$ sed -n '1,3p' sed.txt liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) wangmin803 pts/16 Jul 29 14:18 (219.149.138.142) majorchan pts/21 Jul 29 15:18 (202.203.137.236)
输出第2行
-bash-3.00$ sed -n '2p' sed.txt wangmin803 pts/16 Jul 29 14:18 (219.149.138.142)
查找含有tomotoboy的行让后输出
-bash-3.00$ sed -n '/tomotoboy/'p sed.txt tomotoboy pts/45 Jul 29 13:53 (219.221.99.155) tomotoboy pts/46 Jul 29 15:24 (219.221.99.155) tomotoboy pts/52 Jul 29 16:20 (219.221.99.155)
输出当前的所有用户
/home/l/g/tomotoboy >who liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
输出第一行到含有字符串tomotoboy的行
/home/l/g/tomotoboy >who | sed -n '1,/tomotoboy/'p liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) tomotoboy pts/16 Aug 7 21:24 (219.221.98.71)
输出原文的同时，输出tomotoboy所在的行号
-/home/l/g/tomotoboy >who|sed '/tomotoboy/'= liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) 2 tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
输出含有tomotoboy的行的行号
/home/l/g/tomotoboy >who | sed -e '/tomotoboy/'= liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) 2 tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) kindy pts/38 Aug 7 21:33 (reverse.gdsz.cncnet.net) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
输出第一行到最后一行
/home/l/g/tomotoboy >who | sed -n '1,$p' liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
输出最后一行
/home/l/g/tomotoboy >who|sed -n '$p' yagamil pts/46 Aug 7 20:48 (199.40.206.191)
append.sed：sed脚本实现附加功能，将hello tomotoboy附件在tomotoboy所在行之后
/home/l/g/tomotoboy >cat append.sed #!/bin/sed -f /tomotoboy/ a\ hello tomotoboy /home/l/g/tomotoboy >who| append.sed liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) hello tomotoboy guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) kindy pts/38 Aug 7 21:41 (reverse.gdsz.cncnet.net) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
文本输出时，把tomotoboy替换成hello
/home/l/g/tomotoboy >who|sed 's/tomotoboy/hello/' liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) hello pts/16 Aug 7 21:24 (219.221.98.71) guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) yagamil pts/46 Aug 7 20:48 (199.40.206.191)
只输出被替换的行
/home/l/g/tomotoboy >who|sed -n 's/tomotoboy/hello/p' hello pts/16 Aug 7 21:24 (219.221.98.71)
如果要附加或修改一个字符串，可以使用（&）命令，&命令保存发现模式以便重新调用它，然后把它放在替换字符串里面。
/home/l/g/tomotoboy >who|sed -n 's/tomotoboy/hello &/p' hello tomotoboy pts/16 Aug 7 21:24 (219.221.98.71) /home/l/g/tomotoboy >who|sed -n 's/tomotoboy/& my friend/p' tomotoboy my friend pts/16 Aug 7 21:24 (219.221.98.71)
删除最后一行 bash-3.00$ sed '$d' sed.txt 删除第一到最后6行 -bash-3.00$ sed '1,6d' sed.txt 删除第一到最后一行 -bash-3.00$ sed '1,$d' sed.txt 删除tomotoboy的行 -bash-3.00$ sed '/tomotoboy/d' sed.txt 用seawolf替代tomotoboy -bash-3.00$ sed 's/tomotoboy/seawolf/' sed.txt 用seawolf替代tomotoboy然后输出到sed.out -bash-3.00$ sed 's/tomotoboy/seawolf/w sed.out' sed.txt
看看我们写好了哪些sed脚本
/home/l/g/tomotoboy >ls -al|grep 'sed$' -rwxr--r-- 1 tomotoboy member 45 Aug 7 21:41 append.sed -rwxr--r-- 1 tomotoboy member 68 Jul 30 16:28 change.sed
看看change.sed的用途是什么？
/home/l/g/tomotoboy >cat change.sed #!/bin/sed -f #change.sed /tomotoboy/ c\ I love China,Ilove Wanzhi.
找到tomotoboy，替换为I love China,Ilove Wanzhi.
/home/l/g/tomotoboy >who|change.sed liuzk423 pts/6 Jul 20 08:27 (219.245.104.240) I love China,Ilove Wanzhi. guise pts/21 Aug 7 17:56 (124.76.10.207) guise pts/35 Aug 7 21:13 (58.41.162.27) uyty pts/38 Aug 7 22:09 (p3213-ipbf803souka.saitama.ocn.ne.jp) yagamil pts/46 Aug 7 20:48 (199.40.206.191)