How to kill a process on a port on ubuntu

Question

I am trying to kill a process in the command line for a specific port in ubuntu.

If I run this command I get the port:

sudo lsof -t -i:9001 

so...now I want to run:

sudo kill 'sudo lsof -t -i:9001' 

I get this error message:

ERROR: garbage process ID "lsof -t -i:9001". Usage:   kill pid ...              Send SIGTERM to every process listed.   kill signal pid ...       Send a signal to every process listed.   kill -s signal pid ...    Send a signal to every process listed.   kill -l                   List all signal names.   kill -L                   List all signal names in a nice table.   kill -l signal            Convert between signal numbers and names. 

I tried sudo kill 'lsof -t -i:9001' as well

Answer 1

You want to use backtick not regular tick:

sudo kill -9 `sudo lsof -t -i:9001` 

If that doesn't work you could also use $() for command interpolation:

sudo kill -9 $(sudo lsof -t -i:9001) 

Answer 2

you can use

fuser -n tcp -k 9001  

see more details in wikipedia