TLDR
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ss

 
Utility to investigate sockets. More information: https://manned.org/ss.8.
 
  • Show all TCP/UDP/RAW/UNIX sockets:
     
    ss -a {{-t|-u|-w|-x}}
     
  • Filter TCP sockets by states, only/exclude:
     
    ss {{state/exclude}} {{bucket/big/connected/synchronized/...}}
     
  • Show all TCP sockets connected to the local HTTPS port (443):
     
    ss -t src :{{443}}
     
  • Show all TCP sockets listening on the local 8080 port:
     
    ss -lt src :{{8080}}
     
  • Show all TCP sockets along with processes connected to a remote ssh port:
     
    ss -pt dst :{{ssh}}
     
  • Show all UDP sockets connected on specific source and destination ports:
     
    ss -u 'sport == :{{source_port}} and dport == :{{destination_port}}'
     
  • Show all TCP IPv4 sockets locally connected on the subnet 192.168.0.0/16:
     
    ss -4t src {{192.168/16}}

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