Wietse Venema, the developer of Postfix, points in an advisory to a security problem in connection with the Linux and Solaris filesystems. As more recent versions of these operating systems no longer comply with the POSIX standard for links, local attackers may be able to attach files to other users' Postfix mailboxes.

Groupware vendor Open-Xchange and Linux distributor Univention have exhibited a product based on their cooperative effort at the SYSTEMS 2008 trade fair in Munich: the combined Open-Xchange and Univention Corporate Server (UCS) 2.1.

Klaus Knopper is the creator of Knoppix and co-founder of the LinuxTag expo. He currently works as a teacher, programmer, and consultant. If you have a configuration problem, or if you just want to learn more about how Linux works, send your questions to: klaus@linux-magazine. com

The Linux kernel mailing list comprises the core of Linux development activities. Traffic volumes are immense, often reaching ten thousand messages in a given week, and keeping up to date with the entire scope of development is a virtually impossible task for one person. One of the few brave souls to take on this task is Zack Brown. Our regular monthly column keeps you abreast of the latest discussions and decisions, selected and summarized by Zack. Zack has been publishing a weekly online digest, the Kernel Traffic news letter for over five years now. Even reading Kernel Traffic alone can be a time consuming task. Linux Magazine now provides you with the quintessence of Linux Kernel activities, straight from the horse’s mouth.

OpenTimetool, a GPL-licensed project time recording tool is now available in version 2.2.2. A new module is ready for mobile phones and PDAs.

Open source developer Tobias Oetiker, in his presentation at the USENIX LISA conference in San Diego, described how he could help one thousand Windows users at Swisscom.com speed up their computers.

The famous Unix admin utility known as Top has many imitators. We take a look at some of the top Top tools.

Even if you are not a programmer, you’ve probably heard of Subversion, a powerful tool for managing changes to software projects. Although Subversion is designed primarily for software developers, it can be useful to mere mortals as well.

Cloud Computing is actually a modern version of an old IT solution. Essentially it is the organising of an IT network into one large, central mainframe into which all the local portals are linked. The ‘cloud’ is the metaphorical name for the central mainframe. It is where all the complex computing is carried out, where the data is stored and where the main processing software applications are run.

Planning and scheduling jobs can mean a lot of work, especially if they are spread across multiple machines. Here’s a tool to make that task a lot easier.

Open source developer Tobias Oetiker, in his presentation at the USENIX LISA conference in San Diego, described how he could help one thousand Windows users at Swisscom.com speed up their computers.

For two years now Novell and Microsoft have been playing with the idea of interoperability between Linux and Windows. They hope to strengthen their partnership further through their announcement of the Advanced Management Pack for System Center Operations Manager 2007 R2 and a beta of the Moonlight Firefox rich media plug-in.