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输出第1行到第3行 Shell代码
-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 Shell代码
-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 Shell代码
-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 Shell代码
/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 Shell代码
/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 Shell代码
-/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 Shell代码
/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 Shell代码
/home/l/g/tomotoboy >who | sed -n '1,$p'
liuzk423 pts/6 Jul 20 08:27 (219.245.104.240)
tomotoboy pts/16 Aug 7 21:24 (219.221.98.71)
guise pts/21 Aug 7 17:56 (124.76.10.207)
guise pts/35 Aug 7 21:13 (58.41.162.27)
yagamil pts/46 Aug 7 20:48 (199.40.206.191)
输出最后一行 Shell代码
/home/l/g/tomotoboy >who|sed -n '$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 Shell代码
/home/l/g/tomotoboy >cat append.sed #!/bin/sed -f /tomotoboy/ ahello 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 Shell代码
/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 Shell代码
/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。 Shell代码
/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) Shell代码
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 Shell代码
/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？ Shell代码
/home/l/g/tomotoboy >cat change.sed #!/bin/sed -f #change.sed /tomotoboy/ cI love China,Ilove Wanzhi. 找到tomotoboy，替换为I love China,Ilove Wanzhi. Shell代码
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