Check Open Port Ubuntu Code Example


Example 1: linux how to see ports in use

# Any of the following 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

Example 2: ubuntu check process on port

sudo lsof -i:22

Example 3: ubuntu open port

sudo ufw allow 1191/tcp

Example 4: 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

Example 5: see what is using a port ubuntu

$ sudo lsof -i:22

Example 6: check what ports are open linux

## if you use linux sudo ss -tulw

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