学习_通用线程sed_笔记

在IBM的”通用线程 — sed 实例“这文章里学了点sed的用法，IBM的文章真的全是精品!
通俗易懂，而且还配有实例，真是经典中的经典~趁着现在有空把学来的写进博客，以免忘记。本人记性不是一般的不好 – -! ~~


root@debian:~/test# cat aaa.txt
112231234
#!/usr/bin
aaaaaaaaaa

bbbbbbbbb
hello
The World
cccccccc
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

删除第一行 sed ‘1d’

root@debian:~/test# sed ‘1d’ aaa.txt
#!/usr/bin
aaaaaaaaaa

bbbbbbbbb
hello
The World
cccccccc
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

删除1-5行 sed ‘1,5d’

root@debian:~/test# sed ‘1,5d’ aaa.txt
hello
The World
cccccccc
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

删除”#”开头的行 sed ‘/^#/d’

root@debian:~/test# sed ‘/^#/d’ aaa.txt
112231234
aaaaaaaaaa

bbbbbbbbb
hello
The World
cccccccc
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

删除包含有abcdefg的行 sed ‘/[abcdefg]/d’

root@debian:~/test# sed ‘/[abcdefg]/d’ aaa.txt
112231234

i i
j j j
Q QQQQQ
p p

删除abc为开头的行 sed ‘/^[abc]/d’

root@debian:~/test# sed ‘/^[abc]/d’ aaa.txt
112231234
#!/usr/bin

hello
The World
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

删除空白行~ sed ‘/^$/d’

root@debian:~/test# sed ‘/^$/d’ aaa.txt
112231234
#!/usr/bin
aaaaaaaaaa
bbbbbbbbb
hello
The World
cccccccc
dddddddddd
i i
j j j
Q QQQQQ
p p
eeeeeeeeee
ffffffffff
gggggggg

来看看 -n是啥意思~

-n, –quiet, –silent

suppress automatic printing of pattern space