awk统计TCP连接状态数量

  1. $ netstat -tnap
    Proto Recv-Q Send-Q Local Address   Foreign Address  State       PID/Program name
    tcp        0      0 0.0.0.0:22      0.0.0.0:*        LISTEN      1139/sshd
    tcp        0      0 127.0.0.1:25    0.0.0.0:*        LISTEN      2285/master
    tcp        0     96 192.168.2.17:22 192.168.2.1:2468 ESTABLISHED 87463/sshd: root@pt
    tcp        0      0 192.168.2017:22 192.168.201:5821 ESTABLISHED 89359/sshd: root@no
    tcp6       0      0 :::3306         :::*             LISTEN      2289/mysqld
    tcp6       0      0 :::22           :::*             LISTEN      1139/sshd
    tcp6       0      0 ::1:25          :::*             LISTEN      2285/master

统计得到的结果：

  1. 5: LISTEN
    2: ESTABLISHED

awk统计TCP连接状态数量 - 图1

一行式：

  1. netstat -tna | awk '/^tcp/{arr[$6]++}END{for(state in arr){print arr[state] ": " state}}'
    netstat -tna | /usr/bin/grep 'tcp' | awk '{print $6}' | sort | uniq -c