sed 整理
文本文件内如如下：
# cat ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
1. a\ 在当前行后添加一行或多行 （ckl后面添加两行）
# sed '/^ckl/ a\\--->test<--- \n haha' ckl.txt （a 后面第二个反斜杠用来被shell转意为换行符，\n 为换行）
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
--->test<--- #添加的行
haha #添加的行
anybody ? help ?
but no money
lover & where
8992323777888
2.c\ 用新文本替换（修改）当前行 。（修改perfect这行）
# sed '/perfect/ c\ wanmei' ckl.txt
This is a test file for sed .
a dood day
wanmei #perfect 变成wanmei
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
3.i\ 在当前行添加一行或多行 （在anybody 前添加一行）
# sed '/anybody/ i\ renheren' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
renheren #添加的行，在anybody 之前
anybody ? help ?
but no money
lover & where
8992323777888
4.d 删除行
# sed '/money/d' ckl.txt （删除money 行）
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
anybody ? help ?
lover & where
8992323777888
5. 将ckl到lover之间所有行结尾替换为**VC**
# sed '/ckl/,/lover/ s/$/**VC**/g' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893**VC**
anybody ? help ?**VC**
but no money**VC**
lover & where**VC**
8992323777888
6.将结尾为两位数字的行，后面添加.5
# sed 's/[0-9][0-9]$/&.5/g' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893.5
anybody ? help ?
but no money
lover & where
8992323777888.5
7.y 将字符转换为另一字符
将1到3行之间所有小写字母全部转换为大写
# sed '1,3y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' ckl.txt
THIS IS A TEST FILE FOR SED .
A DOOD DAY
PERFECT !
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
8.h 把模式空间里的内容拷贝暂存缓冲区 （将ckl这一行拷贝到最后一行）
# sed -e '/ckl/h' -e '$G' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
ckl893
9.h 把模式空间里的内容追加暂存缓冲区 （将ckl这一行追加到最后一行）
# sed -e '/ckl/H' -e '$G' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
ckl893
10.g取出暂存缓冲区内容，将其拷贝到模式空间，覆盖该处原有的内容。
（把包含perfect 这行拷贝到暂存空间，删除改行，然后替换掉文件包含but的行。）
# sed -e '/perfect/{h;d}' -e '/but/{g;}' ckl.txt
This is a test file for sed .
a dood day
perfect !
ckl893
anybody ? help ?
perfect !
lover & where
8992323777888
11.G取出暂存缓冲区内容，将其拷贝到模式空间，追加在原有内容后面
（把包含perfect 这行拷贝到暂存空间，删除改行，然后追加到文件的最后一行。）
# sed -e '/perfect/{h;d}' -e '$G' ckl.txt
This is a test file for sed .
a dood day
but i no ideal
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
perfect !
12.x 交换暂存缓冲区与模式空间的内容
（包含lover的行将被perfect 的行替换。）
# sed -e '/perfect/h' -e '/lover/x' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
anybody ? help ?
but no money
perfect !
8992323777888
13.！对所选行以外所有行应用命令
（只保留只包含but的行）
# sed '/but/!d' ckl.txt
but i no ideal
but no money
14.{} 组合命令
（删除perfect到ckl之间所有空行，并将包含but的行拷贝到暂存空间并删除）
# sed '/perfect/,/ckl/{/^$/d;/but/{h;d}}' ckl.txt
This is a test file for sed .
a dood day
perfect !
ckl893
anybody ? help ?
but no money
lover & where
8992323777888
15.n 读入下一行，从下一条命令开始，而不是第一跳命令开始操作
（匹配到ckl这行，从这行下一行开始，将anybody替换为lover）
# sed '/ckl/{n;s/anybody/lover/;}' ckl.txt
This is a test file for sed .
a dood day
perfect !
but i no ideal
ckl893
lover ? help ?
but no money
lover & where
8992323777888