SS is another Linux utility that can be used to dump socket statistics. Written by Alexey Kuznetsov it allows showing information similar to netstat. According to man ss it can display more TCP information than other tools. Here it an example of it’s usage:

viper@viper-laptop:~$ ss -t -n
State Recv-Q Send-Q Local Address:Port Peer Address:Port
ESTAB 0 0 192.168.0.7:58636 62.64.83.230:2233
ESTAB 0 0 192.168.0.7:48629 209.85.133.109:995
ESTAB 0 0 192.168.0.7:51581 208.66.64.132:80
ESTAB 0 0 192.168.0.7:36079 62.64.83.230:904
ESTAB 0 0 192.168.0.7:36078 62.64.83.230:904
CLOSE-WAIT 0 0 192.168.0.7:44531 91.189.89.8:80

Sockets summary statistics:

viper@viper-laptop:~$ ss -s
Total: 539 (kernel 566)
TCP: 13 (estab 5, closed 0, orphaned 0, synrecv 0, timewait 0/0), ports 18

This utility is available by default in many Linux distributions like Ubuntu, Debian or Fedora.

 

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