Bash one liner: Who occupies my port

By | July 11, 2025

A nice and simple way to determine what process occupies a port in Linux is using lsof

For example if you want to see what process is occupying port 3000.

❯ lsof -i tcp:3000
COMMAND       PID   USER   FD   TYPE   DEVICE SIZE/OFF NODE NAME
grafana-s 2782596 gvoina   14u  IPv6 32302690      0t0  TCP *:hbci (LISTEN)

Looks like we have here a Grafana server working in background.

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