If you use or administer Red Hat Linux or a derivative of it, such as CEntOS then you have likely heard of or come across SELinux. SELinux is not universally loved and has a reputation for being something that admins learn just enough about to turn off lest it break their system at some inopportune moment. Is this reputation fair? Should we be making the effort to learn to use it properly or is it best left on the shelf? The following is based on my own experience learning to administer selinux in preparation for the Red Hat Certified System Administrator (RHCSA) exam for RHEL7 and conversations with system administrators (and in some cases Red Hat staff) about that experience. I am not attempting to give a technical overview of SELinux here. This paper is an evaluation of the implementation of selinux as used by Red Hat and the principles they advise for its use.

This is an older post that was originally published elsewhere in August 2015 So I decided to post a review of my own Dell XPS13 developer edition, supplied running Ubuntu three weeks ago. I’m not going into great detail on the hardware, apart from where it has specific relevance to a Linux install as this has been covered by many reviewers save to say that the screen and its small bezel is a key selling point, as is the ‘Precision’ touchpad. Hardware reviews by other sites include Tech Radar review (Windows version with same hardware) and iFixit Teardown. There are many others.