usm port

Show what's listening on which port; free a port by killing whoever owns it.

usm port             # every LISTEN socket
usm port 8080        # who's on 8080
usm port ls          # explicit form of the bare command
usm port kill 8080   # SIGTERM the holder, then SIGKILL after 3s if still up
usm port kill 8080 --force   # SIGKILL immediately

Output

psutil.net_connections() for LISTEN sockets, joined with psutil.Process for command line + user. Without root you may see - in the PID/USER/COMMAND columns for sockets owned by other users — run with sudo for full visibility.

Why

Two daily-life cases:

1. "What's already on port 8080?" Trying to start usm tunnel local 8080:... and the bind fails — usm port 8080 answers immediately.
2. "Just free that port." usm port kill 8080 for the impatient.

Source

scripts/port.py