[Short Tip] Workaround MIT-SHM error when starting QT/KDE apps with SUDO

Starting GUI programs as root usually is not a problem. In worst case, sudo inside a terminal should do the trick. However, recently I had to start a QT application as sudo from within GNOME. It was the yubikey configuration GUI, a third party tool thus not part of any desktop environment. Executing the app … Continue reading [Short Tip] Workaround MIT-SHM error when starting QT/KDE apps with SUDO

So you think offline systems need no updates?

Often customers run offline systems and claim that such machines do not need updates since they are offline. But this is a fallacy: updates do not only close security holes but also deliver bug fixes – and they can be crucial. Background Recently a customer approached me with questions regarding an upgrade of a server. … Continue reading So you think offline systems need no updates?

[Short Tip] Debug Spamassassin within Amavisd

Filtering e-mail for spam and viruses can be done efficiently with Amavisd-New. Besides its own technologies to identify and filter out Spam it can also make use of Spamassassin and its results. However, since Amavisd starts Spamassassin itself, it sometimes is hard to debug when something is not working. For example in a recent case … Continue reading [Short Tip] Debug Spamassassin within Amavisd

[Howto] ownCloud auto setup including LDAP

The self hosting file sharing solution ownCloud is becoming increasingly popular, even in companies you regularly come across installations. To make auto setup of ownCloud easier the following howto shows the steps to automatically connect it to a LDAP server. File exchange services like Dropbox or Google Drive offer a neat and quick way to … Continue reading [Howto] ownCloud auto setup including LDAP

[Short Tip] Splitting and merging PDF files

I recently had to modify quite a stack of PDF files. Many of them where scanned documents, and sometimes I only needed certain pages, or had to re-arrange parts of some files in new documents. A set of handy tools to perform such low level tasks quick and easy comes along in the package poppler-utils. … Continue reading [Short Tip] Splitting and merging PDF files