Ajenti is a server admin panel program for web administrators. It’s available for Debian (or its derivatives such as Ubuntu), Arch, CentOS, FreeBSD, Gentoo etc. Most of the server administrators prefer command line, that’s usually fast and efficient for setup and deployment, but for monitoring servers, it would be lot easier to use an admin panel like Ajenti, especially if you’re not very good at commands.
Ajenti provides a very nice and easy to use Dashboard for monitoring and controlling servers, you can check resource usages (RAM, CPU graphs and reports), configure firewall, DNS, check logs, install/update packages, analyse network status, create/remove cron jobs, recovery/backup settings and a lot more things (just install the plugins you want to use). It basically provides an elegant GUI for managing servers, in a very easy way. You would probably feel like – using a desktop environment, specifically designed for server administration.
Setting up Ajenti on Debian/Ubuntu
Checkout the official website (for more info) : http://ajenti.org/