Linux tutorial

How to get a list of open ports in Linux?

So you have set up a very secured server but still don't you want to cross check if the machine is really secured and your server has not been compromised by anyone. If is always better to regularly scan your system with open ports and list of connected machines.

 I will show you the command to get a list of open ports in any machine

nmap command can be used to do the same. You can download in RedHat machine using yum

# yum install nmap
Once installed verify the package


# rpm -qa | grep nmap nmap-5.51-2.el6.i686
Syntax
# nmap <address>

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