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  1. Get a list of Open Ports in Linux - Super User

    Jan 8, 2013 · I need a Linux command to list all free open ports for use in an application lsof -i TCP| fgrep LISTEN Does not seen to be helping as the Ports it lists are not necessarily free for …

  2. Test if a port on a remote system is reachable (without telnet)

    Feb 12, 2016 · Over time, it's easy to lose track of which ports are open to which hosts. Is there another way to test if a port on a remote system is open – using a Linux system with a limited …

  3. How can I check which ports are busy and which ports are free on …

    Is there any command line command or any other way to find and list out the busy and free port numbers on my Linux machine?

  4. Linux command get unused port - Super User

    Mar 4, 2015 · I'm looking for a command or script which returns an unused port on my ubuntu linux system. I have look on internet and the only thing I find is about the used/Listen port with …

  5. linux - Scan open port with netcat - Super User

    Jan 30, 2020 · Fastest way to check for open TCP ports on your own machine is ss -lt.

  6. linux - How to find open ports using netstat? - Super User

    Apr 21, 2020 · Not shown: 65534 filtered ports PORT STATE SERVICE 22/tcp open ssh How to get such information from netstat/ss? I basically want to find the ports which can listen to other …

  7. shell - List open SSH tunnels - Super User

    I use a lot of SSH tunnels to various servers on my linux machine (for tunnelling to databases, web servers etc) and it would be really handy to view a list of current open tunnels via a shell …

  8. Finding the process that is using a certain port in Linux

    Jun 17, 2011 · I'd like to be able to find out which process is currently using a certain port in Linux. Is there any way to do this?

  9. how to use netstat on a specific port in Linux - Super User

    May 31, 2013 · Guys i want to know if my specific port is running a server using netstat? how do i achieve that?

  10. linux - What ports are used by an application - Super User

    May 6, 2015 · I'm testing an application which opens its own ports (acts as a server for these ports, hence listens at that ports) and where the same application connects to ports bound by …