process on port code example

Example 1: linux query port use by pid

$ sudo netstat -nlp | grep :80
tcp  0  0  0.0.0.0:80  0.0.0.0:*  LISTEN  125004/nginx

Example 2: ubuntu check process on port

sudo lsof -i:22

Example 3: find out which procses is using port linux

sudo lsof -i:<port_number>