Entries by Stefan Helander

How to change timezone and synchronize time in Debian Linux



To ensure that things are being logged with correct time stamps in your system logs, it is important that your system is configured for your particular timezone and that your system clock is being synchronized to a correct time source. Normally when you set up your Debian Linux system the correct time zone will be […]

Horde Groupware Webmail alarms.php memory problem



To enable alarms in Horde Groupware Webmail you must add the following to your crontab: # Horde Alarms */5 * * * * /usr/bin/php /var/www/horde/scripts/alarms.php Depending on your system, the paths above might be different. You may experience the following error message when the script is run by cron: Allowed memory size of 8388608 bytes exhausted […]

Mysterious new mail icon in system tray



A new mail notification that occurs on the system tray looking like this: Nothing will happen when you hover the mouse over it or clicking on it. It is hard to understand which software this icon belongs to. The answer is Vodafone Mobile Connect which is a software used to connect with 3G mobile networks […]

Shutdown Windows Vista via Remote desktop



When you connect to a host running Microsoft Vista remote via Remote Desktop, the Shut down button is replaced by Disconnect. To shutdown the host remote click on Windows Security just above the normal place for the shutdown/logout/disconnect buttons. This will bring up the standard screeen for switching user, task manager etc. At the right a […]

How does Internationalized Domain Names (IDN) work?



By the introduction of Internationalized Domain Names (IDN) it is now possible to register domain names on the Internet, containing regional characters, like for example www.räksmörgås.se.This is possible for a number of the Top Level Domains (TLD), like .se and .nu.

Mac-adress lookup tool



When troubleshooting networks, when there is an IP-address conflict for example, it is sometimes useful to lookup the vendor of the mac-addresses. This way you can identify the brand of the conflicting host. A tool for doing this is found here. It contains information about both ethernet and bluetooth manufacturers.

VirtueMart installation problem (Joomla!)



If the installation of VirtueMart version 1.1.3 for Joomla! 1.5.10 fails, a manual installation is needed. The error message says that some critical components of VirtueMart are missing. In addition to the following instructions, read the VirtueMart installation manual. Download the VirtueMart Manual Installation package for Joomla! 1.5 from VirtueMart website. Unzip the contents of the archive to […]

Ubuntu eee: Intermittent DNS problems with Windows Vista Internet Connection Sharing (ICS)



When connecting an Asus EeePC 900/901 running Ubuntu eee 8.04 (‘Easy Peasy‘) to the Internet through a Windows Vista machine running Internet Connection Sharing (ICS) and you are experiencing intermittent DNS-problems, the problem can be related to IPv6 being enabled but there is no IPv6 Internet connection (only IPv4). In Firefox there is a DNS-error […]

Ubuntu eee: Youtube video problem



In Ubuntu eee 8.04 for Asus EeePC 900/901 (‘Easy Peasy‘) there is a problem when trying to look at Youtube videos. Almost all videos gives a message saying that it is not currently available. The problem is the flash player included in the Ubuntu eee installation. To resolve the problem: Try do uninstall ‘flashplugin-nonfreebeta’ using […]