Ssh passwordless authentication – Why?
There are a variety of reasons why you would and should use ssh passwordless authentication, personally I tend to jump from one system to another quite frequently and probably you know better than me remembering a large number of password or even typing the same one over and over is not fun at all.
Apart from personal preference there is a small bit of added security in using ssh passwordless authentication, as the same implies not using a password means that one is not traveling through the wire (or the air if on a wireless connection) adding a layer of security Read more…
Starting with this post I commit myself to write every now and then posts that depict Linux “good” practices and habits, not overcomplicated posts about a specific argument but more a series of quick tips to show good Linux Admin habits.
Read more…
Linux VLAN Configuration – The basics
VLAN is the short acronym for “Virtual LAN” which basically translates into creating multiple, separated LAN segments on the same physical switch without the need to use multiple network switches/cables to break up the network into smaller and more manageable entities. VLAN are created for a variety of reasons among which :
- Network performance
- Network security
- Manageability
A complete and detailed description of VLAN is out of the scope of this post but if you are interested you can find a pretty explanatory article here. Read more…
RHCSA Exam Experience – AKA What I did to pass the exam
As a twitter friend requested me to wrrite this post more than once I finally managed to put aside some spare time to write it hoping that it will help all people out there that are preparing for the RHCSA exam or plan to do it and are not sure how to approach it or how difficult it is.
First of all please keep in mind that I will be covering only RHCSA exam in this post as that is the one I’ve taken, one month ago, as RedHat in Switzerland does not offer the combined “2 exams in 1 day” package hence I’ve been forced to split them as I don’t have the time to travel to Italy or Germany to give both exams in the same day. I’ve booked my exam for next April once I’ve been through it (again) I will write about RHCE experience as well. Read more…
Q: I’ve accidentally modified the SELinux context for a file or directory and now my application is not working any more how canI restore the default context?
A: As you probably know SELinux is enabled in Enforcing mode by default on RHEL and Fedora systems and while it helps keep your system secure, of course it is not the panacea to all security risks just one the bricks for a better protection, sometimes it can get in the “middle” of normal operations. Read more…
