Tech

It's very easy to implement locking in a bash script using mkdir. While there are other methods like: * Touch a file and check its availability * Use special tools like lockfile-progs in Debian or lockfile in other distributions * Find the running process with pgrep I prefer mkdir for simple

A few weeks ago, the OpenSource Groupware Kolab 3 has been released [https://www.kolab.org/news/2012/12/17/final-version-kolab-3.0-released]. It features a brand new Webmail client based on Roundcube (which is really very nice), a completely new web based administration panel (called WAP - Web Administration Panel)

If the passcode of a Nokia N9 MeeGo phone is lost, it's not that easy to access files on it. I've wrote an article about this, it has been originally published on AllBoutN9 [http://www.allboutn9.info/2013/01/lost-access-to-your-n9-heres-solution_23.html] > We all should

Puppet as of version 2.7 has not been designed to iterate over datastructures, but there are some tricks we can use. Here are two links to the Puppet documentation which explains Arrays and Hashes: * Arrays [http://docs.puppetlabs.com/puppet/2.7/reference/lang_datatypes.html#arrays] * Hashes [http:

Blog post Be productive with the MySQL command line [http://www.mysqlperformanceblog.com/2012/12/21/be-productive-with-the-mysql-command-line/] on "MySQL Performance Blog" about the MySQL command line shortcuts and what other nice things you can do with it.

Some time ago I had troubles with the backspace key while configuring a Brocade device. It did not do anything. The problem is, that my terminal (Konsole) does not send "Ctrl-H", but the Brocade terminal expects it to delete a character before the cursor. To solve this problem,

For BGP traffic engineering it's very important to know which Destination-AS takes which path on your Upstream links. There is a great tool to visualize this: as-stats [https://neon1.net/as-stats/]. It's too bad that this nice piece of software lacks some very important things: There

Rancid [http://www.shrubbery.net/rancid/] is a great tool to regularly save configs of network devices in SVN such as routers and switches. There are many how-tos for installing and configuring this tool (so I don't have to re-invent the wheel): * Linux Home Networking [http://www.linuxhomenetworking.