Linux Shell common Commands

2. For loop

   applist= (App1 app2 app3); for apps in ${applist[@]};d o echo $app;d one;

3. Get IP Address

   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,\} '
   

5. Format output document

   cat xxxx | awk  ' {print  "n" NR "= "$," "M" NR "=" $ "|column -t formatting the output document

7. Output a log for a certain time period

   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

9. echo No newline output

   Echo-n "XX";

11. Output line breaks or tab keys in awk or Echo

    Echo-e "123\t345" >/tmp/123.txt;cat/tmp/123.txt | awk ' {print ' "\t,\n"
    

13. Cond

This article from the "Dream do not know is a guest" blog, please be sure to keep this source http://tenfee.blog.51cto.com/6353835/1918958

Linux Shell common Commands