As the title suggests, I was setting up
a software on my machine and I needed to know which ports were
already used up and which were available for the new install.
I found some posts on the Internet to
help me resolve this, and here is a summary of what I found.
First, I logged in as root using the
command
$ sudo -i
Next I listed all processes that are
listening on a port using the following command.
$ lsof -i
Now, I wanted to know all the used
ports on my machine. The following command gave the answer.
$ netstat -tulpn
Finally, I wanted to list only those
ports that were being used along with the processes.
$ netstat -lptu
This gave a list of ports that are
currently in use on my machine. Using this list, I was able to find
out which ports could be assigned to the new installation.
