bash find process using port
lsof -i :8080
find out which procses is using port linux
sudo lsof -i:<port_number>
linux which process is using a port
$ sudo netstat -ltnp | grep ':80'
bash list process on port
sudo lsof -i:3000
#Just change the port 3000
linux check what process is using port
$ netstat -ltnp | grep -w ':80'
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
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