netstat

Print network connections.

$ netstat

Protocol

All

TCP

UDP

Listening

Numeric addresses (-n)Show program (-p)Routing table (-r)Statistics (-s)Interfaces (-i)

All connections (-a)Extended info (-e)Continuous (-c)Show timers (-o)Wide output (-W)IPv4 only (-4)IPv6 only (-6)

Examples

# Show all connections
netstat -a

# Show listening TCP
netstat -ltn

# Show with program names
netstat -tlnp

# Show routing table
netstat -r

# Show interfaces
netstat -i

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