SHELL

how to check list of open ports in linux

sudo lsof -i -P -n | grep LISTEN
sudo netstat -tulpn | grep LISTEN
sudo lsof -i:22 # see a specific port such as 22
sudo nmap -sTU -O IP-address-Here

check open port linux

netstat -lntu

check what ports are open linux

## if you use linux
sudo ss -tulw

linux command open ports list

open ports LNX