SHELL

ubuntu check process on port

sudo lsof -i:22

how to find process running on port in ubuntu

sudo lsof -i:8080

list which process is running on specific port ubuntu

sudo netstat -ltnp | grep -w ':80' 
#port_number: 80
#output: tcp6       0      0 :::80                   :::*                    LISTEN      1907/nginx: master