By Anže Vidmar

In this article I'll show you some simple tricks to help you tighten security for your secure shell (SSH) service.

The RAR and 7-Zip file compression formats originated on Windows, so support for them on Linux is not as automatic as it is for old Unix holdovers like Gzip and TAR. But with the right software, you can handle these compressed files without much trouble.

Before Vim 7.0 was released last May, I usually had six or seven xterms or Konsole windows open, each with a single Vim session in which I was editing a single file. This takes up a lot of screen space, and isn't very efficient. With Vim 7.0, users now have the option of using tabs within Vim. With Vim's tab features you can consolidate all your sessions into one window and move between files more easily.

By Mayank Sharma

Operating system security revolves around controlling access. Linux distributions subscribe to the Discretionary Access Control (DAC) mechanism that lets resource owners decide who gets to access the resource and how. People soon realized that DAC is not an ideal solution, as it gives applications the same privileges of the user running them. One compromised application running as root effectively compromises the full system. This led security experts to develop Mandatory Access Control (MAC), which grants access to resources as defined by a security policy, regardless of the user running the application. The Security Enhanced Linux (SELinux) project is the first mainstream implementation of MAC.