tldr/linux/ss.md

ss

Utility to investigate sockets

• Dump all TCP/UDP/RAW/UNIX sockets

ss -a {{-t/-u/-w/-x}}

• Show process(es) that using socket

ss -p

• Filter TCP sockets by states, only/exclude

ss {{state/exclude}} {{bucket/big/connected/synchronized/...}}

• Filter sockets by address and/or port

ss -t dst 1.2.3.4:80 ss -u src 127/8 ss -t 'dport >= :1024' ss -x "src /tmp/.X11-unix/*" ss -t state established '( dport = :ssh or sport = :ssh )'

• Only list IPv4 or IPv6 sockets

ss {{-4/-6}}