#1

  awk -F:   ‘{print$0 "-->" $1 "-->" $2 }‘ /etc/passwd

#2 多个匹配

  awk‘/yeqing|mysql|nginx/‘ /etc/passwd    

#3 正则匹配

  awk ‘/^yeqing|mysql$/‘ /etc/passwd

#4 将小写转换成大写

  cat yeqing.txt |tr ‘a-z‘ ‘A-Z‘ > p.txt 

 或者

 awk ‘/yeqing/‘/etc/passwd |tr "a-z" "A-Z" >tmp.txt

#5 取出第二行

  ifconfig eth0 |awk -F‘:‘ ‘NR==2 {print $2}‘  

 ifconfig eth0 |awk -F: ‘NR==2{print $2}‘ |awk-F‘ ‘ ‘{print $1}‘

#6 取出第二行用“空格”或者“:”去分割

  ifconfig eth0 |awk -F ‘[ :]+‘ ‘NR==2 {print $4}‘

#7 统计

  awk ‘{count++}END{print "ct:",count}‘ /etc/passwd

  awk ‘{i++}END{print i}‘ /etc/passwd

 cat /etc/passwd |wc -l

#8 统计某个文件夹下的文件占用的字节数:

  ls -l |awk -F ‘ ‘ ‘BEGIN {size=0;} {size=size+$5;} END{print "size:",size}‘

  以M为单位显示

  ls -l |awk‘BEGIN {size=0;} {size=size+$5;} END{print "[end]size is ",size/1024/1024,"M"}‘

#9 分析access.log获得访问前10位的ip地址

    awk ‘{print $1}‘access.log |sort|uniq -c|sort -nr|head -10

    或者

    awk ‘{print $1}‘/usr/local/sina_mobile/nginx/logs/access.log |sort|uniq -c|sort -nr|head -10

    tail/usr/local/sina_mobile/nginx/logs/access.log |awk -F ‘ ‘ ‘{print $1}‘|sort|uniq -c |sort –nr

本文出自 “技术屌丝” 博客，谢绝转载！

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