Dec 312013
 

Today I present an interesting aritcle on Bad Blocks, first published on http://virtualprivateserver.castlegem.co.uk/

Hardware fails, that is a fact. Nowadays, hard drives are rather reliable, but nevertheless every now and then we will see drives failing or at least having hiccups. Using smartcl/smartd to monitor disks is a good thing, below we will discuss how some lesser issues can be handled without actually having to reboot the system – it is still up to a sys admin’s own discretion to judge circumstances correctly and evaluate whether disk errors encountered are a one time incident or indicative of an entirely failing disk.

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Dec 282013
 

Article by Alessio bash, first published on his blog

Many security policies require you to change the port number of the SSH service to ensure greater security in a Linux system. Situation now used throughout the IT world and used mostly by users who have their own private server. Today I want to show you how to add another security layer without having to change the SSH port. To do this we’ll incorporate the famous Google Authenticator to our ssh service, in this way we’ll have a safe, two steps security, by entering our password and the combination given from the GA application. Let’s see how to do this… Continue reading »

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Dec 262013
 

This is the second part of my article on my favorite games released for Linux in 2013, this is the list of my personal top 10.

10 Knight of pen and paper +1
9 Shank 2
8 FTL – Faster than Light
7 Defender’s Quest – Valley of the Forgotten
6 Trine 2
5 Legend of Grimrock
4 Dungeons of Dredmor
3 Don’t Starve
2 Let 4 dead 2
1 Crusader Kings II

As you can see from this list I like strategy games and RPGs, but in this list there are also other genres, you will find a description of the games from position 10 to 6 in the first part of this article.

You can find all of these games on Steam, and most of them are available at a discounted price on The Humble Store, I suggest to take a look at both websites as in these days they are doing big sales on these titles with discounts from 25 up to 75% of the listed price.

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Dec 172013
 

citadel

I was searching for lightweight collaboration suite (messaging and groupware) to manage some small websites and while searching around I found Citadel.

Citadel is a complete and feature-rich open source groupware platform.

  • Email, calendaring/scheduling, address books
  • Bulletin boards, mailing list server, instant messaging
  • Multiple domain support
  • An intuitive, attractive AJAX-style web interface

The Citadel system is extremely versatile. It provides numerous front ends to present to users, such as a text-based interface, an AJAX-style web interface, and many popular PIM clients using SMTP/POP/IMAP. All of these can be used simultaneously.

It’s also extremely scalable. Not only can a well-equipped Citadel server support a large number of concurrent users, but you can also build a distributed network of Citadel nodes that share rooms and their content.

Let’s see how to install and configure it on a Debian 7 “wheezy”, most of this guide it’s based on the great linode guide wrote for debian 6.
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Dec 122013
 

The sysadvent blog it’s up and running again. In this period of the year you’ll find there 1 great post every day, so keep it in your bookmarks !

This was written by Michael Stahnke last year, but it’s till good to me.

It’s happened. The DevOps term has been picked up by everybody and their brother. From analysts, to marketing firms, to recruiters, the term is everywhere. Beyond it being a very loud echo chamber, it sparks debate. I see tweets and complaints all over the blogosphere about how hiring a ‘DevOps’ team, or being a ‘DevOps’ isn’t the proper adoption of this methodology. That may be true, but arguing about it seems to only be a net-loss from the collective brain-power reading and responding to said internet ramblings rather than solving difficult systems problems.

The push has been largely around culture. DevOps is culture. I’ll agree with that, but it’s not just being rockstar-ninja-superheros operating at web-scale.

I’ll pick up my story in 2007. I had just moved to a new state, new team, new role as a system administrator (mostly doing Unix/Linux). This move was at the exact same company I had worked at since 2002. This move wasn’t a promotion. The Unix team, a seven person team, had had five amazing system admins quit in span of about 60 days. On paper, me taking this job sounded like a horrible idea, so why was it interesting to me? Unlike the rest of $Company, this business unit did things a little bit differently. For some reason, they purchased hardware not on the approved list. They let you run Linux on your desktop. However, the thing that was most interesting to me was the software stack: they ran on Open Source. The most profitable business unit in $Company ran huge amounts of open source software! It was awesome. Rather than drowning in Tivoli, HP, CA and BMC system tools, they had tooling set up with nagios, irc, subversion, cfengine, trac and copious amounts of perl.

This spoke a bit about the culture of the business unit IT department.

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