Webmin
Linux is widely known for its command line operations. However, everyone may not be the terminal guy like me 🙂 who like to do administration with graphical tools. There are many solutions to this problem. One of the best solutions among many is to use Webmin. It is a graphical web-based interface written in Perl version 5 for administrating Linux machine. Various operations can be performed using the interface like adding, removing users, creating the job, viewing the system information and many more. Webmin is powered by web server connecting with the number of CGI programs which directly update system files.
Sources: All the pictures included here are downloaded from http://www.webmin.com

Running Processes

Edit user quota

Add new backup

User admin in Webmin

Create Webmin User

NFS Exports