linux show process using port code example

Example 1: linux check what process is using port

$ netstat -ltnp | grep -w ':80'

Example 2: find out which procses is using port linux

sudo lsof -i:<port_number>

Example 3: bash list process on port

sudo lsof -i:3000
#Just change the port 3000

Example 4: check if port is running in ubuntu

# Any of the following
sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 # Port
sudo nmap -sTU -O IP-address-Here