2018-10-24 awk去重

[Gooooooooood] http://www.runoob.com/linux/linux-comm-awk.html

• awk如何打印出除了第一列以外的其他列 ?
  from: https://blog.csdn.net/qiudakun/article/details/6266892

  awk 'sub($1,"")'

  or
  awk '{$1="";print}'

• regular expression matching

    # ok
    # ~ 表示模式开始。// 中是模式
    awk '$4 ~ /opensnoop/ {print $4}' xy-filter.sh-20181030
  
    # verbose
    awk '$4 !~ /opensnoop/ {print $4}' xy-filter.sh-20181030
  
    # regular
    awk '$4 ~ /opensnoop|awk|中/ {print $4}' xy-filter.sh-20181030
  

final

    awk '$5 ~ /\/dev\/|\/proc\/|\/sys\// {print}' opensnoop.log-20181030 | sudo tee test

文本如何去重？uniq awk
From: https://blog.csdn.net/u013176681/article/details/77540543