1. for循环

   applist=(app1 app2 app3);for app in ${applist[@]};do echo $app;done;

2. 获取IP地址

   ifconfig |grep -Po ‘(?<=addr:).*(?=Bc)‘

   ifconfig|awk -F"[: ]+" ‘$4~/[0-9].+[^0-9]+/{print $4}/lo/{exit}‘

   ifconfig|sed -nr ‘s/^[[:space:]]+inet addr:(.*) Bcast.*/\1/p‘

   ifconfig | grep -o ‘\([1-9]\{1,3\}\.\)\{3\}[0-4]\{3,\}‘
   

3. 格式化输出文档

   cat xxxx | awk ‘{print "n"NR"="$1,"m"NR"="$2}‘|column -t 将格式化输出文档

4. 输出某段时间内的日志

   sed -n ‘/2015-07-27 11:00/,/2015-07-27 11:20/p‘ xxx_server_log > dsadsads.log

   sed -n ‘/06\/Dec\/2016:20:30:00/,/06\/Dec\/2016:21:00:00/p‘ json_access.log.2016-12-06 > dsadsads.log #加了转义

5. echo不换行输出

   echo -n "xx";

6. awk或者echo中输出换行符或者Tab键

   echo -e "123\t345" > /tmp/123.txt;cat /tmp/123.txt | awk ‘{ print $1 "\t,\n" $2 }‘
   

7. 待续

本文出自 “梦里不知身是客” 博客，请务必保留此出处http://tenfee.blog.51cto.com/6353835/1918958

linux shell常用命令