If you install and configure a Postfix mail server for relaying mails using an external smarthost you might be puzzled about the following error message:

1Mar 19 17:00:22 hostname01 postfix/smtp[2003]: warning: SASL authentication failure: No worthy mechs found

The reason for this issue can be really trivial - in my …

Hint: The following issue has been fixed by a RHEL / CentOS patch (util-linux-ng) - just update your system!

If you want to install Open Monitoring Distribution on RHEL or CentOS 6.4, you might have the problem that creating sites isn't working as expected:

1# omd create test
2Adding /omd/sites/test/tmp to /etc/fstab. …

After 6 months of developing, openSUSE 12.3 was released today.

Time to have a look at the roots. openSUSE is based on the former S.u.S.E. Linux - S.u.S.E stood for the german company name (Gesellschaft für Software- und System-Entwicklung GmbH).

The first official S.u.S.E. version 4.2 was released 1996 and came with …

Recently I had problems with installing Oracle 11gR2 Express Edition on CentOS 6.4.

The installation of the RPM package worked but the database configuration crash with the following error:

1# service oracle-xe configure
2...
3"Database Configuration failed.  Look into /u01/app/oracle/product/11.2.0/xe/config/log …

If you want to receive mails on your smartphone or tablet you have to choose between two completely different technologies:

• Polling - The mail server is contacted in a pre-configured timeframe (30 minutes, 1 hour,...) and asked for new messages
• Pushing - The mails servers informs the mobile device about about new …

4EXT and ClockworkMod are two recovery images for Android devices - they can be used for installing, saving and restoring alternative ROMs.

But what's the difference between those two tools? That's what this article is about.

Depending on the Android ROM it might be required to use on of the two tools. For example, …

After I have been using Sense ROMs for a long time, I decided to "make a journey abroad".

On my Nexus 7 I'm using Android 4.2.2 - and I'm very satisfied with it. I decided to try this Android release also on my HTC sensation.

On xda-developers I spotted a ROM which is based on CyanogenMod 10.1 (Android 4.2.2) …

Not everybody wants his contacts and calendar entries synchronized to the Google Cloud - I'm also one of those persons who prefer synchronizing sensitive data locally.

With HTC ROMs you can use HTC Sync for this - for me this have been the only reason why I used this ROMs for a long time.

But what to do if you don't …

Since I rooted my smartphones I tried a lot of ROMs and finally always ended with Sense ROMs. The main reason for this was the HTC Sync tool which enabled me to synchronize contacts and tasks with my local Outlook.

HTC Sync is only compatible with HTC ROMs - Android stockroms are not supported. I found no other tool …

Currently I'm implementing a IPSec tunnel between my and another flat. After my first plan, using an already existing Raspberry Pi as IPSec gateway, fizzled after plently of failed tries I decided to implement a router-to-router solution.

The center of my network is a ALIX.2D13 which is used as IPCop to offer DNS, NTP …