linux - How to find process using TCP port? -


after starting http couple of times error instance of go has not stopped!?

listen tcp :9000: bind: address in use

i have experienced nodejs able kill process.. unfortunately seems can't find process id , kill it..

how "free" tcp port?

if on unix system can use netstat find out process listening on port:

sudo netstat -nlp | grep 9000

turns out -p option not available on os x. if using os x can this:

lsof -n -i4tcp:$port | grep listen

who listening on given tcp port on mac os x?


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