• Linux

    DHCPd failover

    Last week, I set up two dhcpd servers in a fail-over configuration. The goal is that when one DHCP server goes down, the other one takes over so that clients don’t lose their network connection. I read different tutorials on the web, such as this one of a fellow blogger and this documentation published by IBM.

  • Linux

    Server migration to Debian

    Since this afternoon, this server is now running Debian GNU/Linux Squeeze. Just like the previous system, this is a KVM virtual machine running on a HP Proliant DL185G5 host. The host server has always been running Debian. This was my last production system still running Mandriva. I might have forgotten to move over a few things or there might be some breakage somewhere, so let me know if you encounter a problem.

  • Linux

    Why prefer Debian GNU/Linux over another distribution

    Quite some time ago I wrote a blog post explaining why I preferred Mandriva over other distributions. But I have now switched to Debian GNU/Linux, so it is time for an update. I will mostly compare with Mandriva because that is where I come from and what I know the best, although most points are rather universal. So, these are some reasons why I prefer Debian GNU/Linux over other distributions: All officially released Debian GNU/Linux stable versions are supported for a long time. Where most other free distributions are supported for about 1,5 year, this is much longer for Debian stable. For example, security updates for Debian Etch were published…

  • Linux

    A wise server migration

    Yesterday I migrated two servers at work to a new machine. The old machines were pretty underpowered: a Pentium III 1 Ghz system (with 384 MB RAM if I remember correctly) and a Pentium 4 system. The new machine is a Dell Poweredge R410 with a Xeon E5504 processor, 12 GB RAM and a PERC H700 RAID controller (which is actually a LSI MegaSAS 9260) with 3 750 GB SATA disks in RAID 5. The hardware is pretty nice (although I am not happy at all with the way Dell treats its customers, so I will rather prefer other vendors in the future, but maybe more about that in a…

  • Linux

    Debian on desktop systems

    What I expected to happen some time ago, is finally becoming reality: Debian is now my favourite distribution for desktop systems. First I installed Debian on my new Samsung N210 netbook and I was very pleased with the result. Shortly after that, my father experienced a bug while trying to print in Firefox on Mandriva 2010.1. It would fail to print and there were errors related to ps2ps (if I remember correctly) in the Cups log, hinting at some bug in Ghostscript. Actually it was not the first time this bug hit us, I had seen the same problem some weeks ago. As analysing and having this bug fixed would…

  • Linux,  Uncategorized

    Samsung N210 netbook on Debian GNU/Linux

    With the upcoming holidays in sight, I could not resist buying a netbook system to take along with me on my travel to Italy. So yesterday, I received a brand new Samsung N210. I chose this system because it is not too expensive and it appeared about the best netbook in this price class according to many reviews. Especially the battery time, keyboard and matte screen are praised a lot. It also seemed to work nice in Linux, which was of course also an important requirement. I have removed the Windows 7 Starter edition which was installed on this system and installed Debian GNU/Linux Squeeze (currently testing) on it. I…

  • Linux,  Uncategorized

    Making your mixed KDE and GNOME desktop look cool

    Most people use a mix of QT/KDE and GTK+/GNOME applications on their Linux system. Because both QT and GTK+ use their own widgets (which are all GUI elements, like buttons, toolbars, menus, checkboxes, etc…) and theme engine, QT and GTK+ applications look different from each other. This is especially bad if you use KDE in Debian: in that case by default no GTK+ theme is configured, making GTK+ applications, like Firefox, look like ugly Windows 95 applications. Mandriva on the contrary does use a common graphical theme for both GTK+ and KDE applications (called Ia Ora), but it’s not easy to change the GTK+ theme if you use KDE or…

  • Linux

    Server migration

    Since two days, I have merged the main servers used by two research laboratories at work. One server was an old Linux server which really needed a hardware upgrade, and the other one was a Mac Pro machine running a flaky OS X Leopard. The new server is of course running Linux: Debian Lenny. It was a very interesting experience: working out procedures to migrate the mailboxes (from Dovecot on the Linux server and Cyrus on the Mac server to Cyrus on the new server), finding out how to set up one NIC in two different subnets (especially the routing is a little bit tricky), getting all services hooked up…

  • Linux,  Mandriva

    Why prefer Mandriva over another distribution?

    Yesterday someone asked on a Dutch website the same question which comes back on sites like Slashdot every time a new Mandriva release is announced: what is the the advantage of Mandriva above other distributions like Ubuntu, OpenSUSE and Fedora. This made me think and so I wrote down a couple of reasons why I use Mandriva on my desktop systems. 10 advantages of Mandriva above other Linux distributions The default graphical theme in Mandriva looks much better than Ubuntu’s brown mess. All graphical configuration tools are centralized in the Mandriva Control Centre. Mandriva has some unique configuration tools, such as msec which permits you to change advanced security settings…

  • Linux

    Updating to Debian Lenny

    Last week-end, Debian Lenny 5.0 was finally released. I use Debian on most servers I manage at work. A few of them were already using Lenny when it was still the testing branch, but most are still on Debian Etch. So this morning I decided to test upgrade one of the less critical Etch systems to Lenny. That system is only used to store back-up files from other systems, so it would not be a problem if that machine was off line for a couple of hours. According to the release notes, you should rather use aptitude instead of apt to upgrade, so that’s what I did. All went well,…