sed常用命令

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sed '1,10d' file                   

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sed ':label;N;s/\n//;b label' 

sed ':a;N;$!ba;s/\n//g' /root/.ssh/authorized_keys

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sed 's/\(.\{5\}\)\(.*\)/\1|\2/g' abcd20190513001.txt | awk -F"|" '{printf("%5s,%8s,%5d,%2s,%8.2f,%6s\n",$1,$2,$3,$4,$5,$6)}'| sed 's/\,/|/g'


echo 'tags: [ "2018" ]' | sed -r 's/([0-9]+\")/\1,\"ALL\"/g'

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cat test1
first:second
one:two

sed 's/\(.*\):\(.*\)/\2:\1/' test   

second:first
two:one
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sed -n '1,4p' file
sed -n '1~2p' file
sed -n '2~2p' file
sed '/pipei/s/zaipipei/tihuan/' file
sed '2 a newline' file  # 第二行后插入新行
sed '/image: docker/a\    restart: always' docker-compose.yml  |grep image  # image: docker 后新增一行