ubuntu check process on port
sudo lsof -i:22
used port linux
# Linux
ss -ltn
# windows
netstat -a -p -n tcp | findstr LISTENING
# SOURCE
https://solace.community/discussion/26/how-to-find-a-free-tcp-port-for-testing-pubsub-with-docker
what com port linux
dmesg | grep tty
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