Ubuntu 18.04 Test if Port is Open

July 12, 2018 | By thelinuxevangelist | Filed in: Tutorial.

Ubuntu 18.04 Test if Port is Open

You Are Welcome! This Tip Shows You How to List Open Ports in Ubuntu 18.04 Bionic LTS GNU/Linux.

And the Ubuntu 18.04 Check if Port is Open is achieved by the Nmap Network Tool.

Finally, Nmap (Network Mapper) is a Security Scanner, originally written by Gordon Lyon (also known by his pseudonym Fyodor Vaskovich), used to discover hosts and services on a computer network, thus building a “Map” of the network.

Ubuntu 18.04 Test if Port is Open - Featured
  1. 1. Opening Shell Session

    On Desktop Open a Terminal window
    Ctrl+Alt+t
    (Press “Enter” to Execute Commands)

    Ubuntu 18.04 Test if Port is Open - Open Terminal Shell Emulator
  2. 2. Installing Nmap

    Then Install Nmap Tool with:

    sudo apt install nmap
  3. 3. Listing Open Ports

    Finally, to List All Open Ports

    sudo nmap -sT -O localhost

    And in the Output you should find a detailed List of the Open Ports:

    Ubuntu 18.04 Test if Port is Open - List of Open Ports