ubuntu find process bound to port code example

Example 1: ubuntu check process on port

sudo lsof -i:22

Example 2: ubuntu get process on port

lsof -i -P -n

Example 3: cli check what is listening on port

lsof -i tcp:53 #Check what is listening on port 53
lsof -t -i tcp:53 #Return the process PID listening on port 53