PortWatch

See what's listening. PortWatch is a focused Linux desktop utility for
finding TCP and UDP listening ports and the processes behind them.

Search by port, process, service, address or protocol. Inspect projects,
related listeners, containers and systemd services when Linux permissions allow.
Request graceful process termination with confirmation. Run the CLI with
snap run portwatch.portwatch-cli (supports search and --json).

Connect network-observe and system-observe for listener/process visibility.
Connect process-control to enable process termination. The app displays the
required connection commands. Desktop shortcuts require manual setup.
Container/service stop and restart and opening host project folders or
terminals are unavailable in this strictly confined test package.