Skip to content

Author: halfgaar

http://www.halfgaar.net/

Halfgaar is Wiebe. Wiebe is a contributing author on this weblog. He also has a lot of stuff (such as long, in-depth articles) on his personal website.

Wiebe works at YTEC, where he is a senior developer of customer-specific tailor-made software (“klantspecifieke maatwerk software“) for clients in a few select markets: wholesale, printing and healthcare.

Find all manually installed packages on a Debian system

This should find all manually installed packages on a Debian system:

aptitude search '~i!~E' | grep -v "i A" | cut -d " " -f 4 Read More »

Enabling quota on a journalled ext3 file system on Debian

Source. And a source for non-journalled quotas. Read More »

Xen console name on different kernel versions

I've just been struggling to get a xen console working for Ubuntu 8.04 (hardy). By default, xen-create-image uses hvc0, but that's only since kernel 2.6.26 (don't know if that's only pv_ops or xen-patched). Hardy uses 2.6.24 and therefore it's xvc0. The xen-create-image command or xen-tools.conf config file therefore need a parameter serial_device=xvc0.

Read More »

Seek time benchmark for linux

This site provided a nice short c program to measure seek times. I would attach the file in case that site goes down, but this blog still has upload errors...

Read More »

Creating iSCSI target and initiator on Debian

This post is even more of a memory aid than normal; it's really only useful to me. Source. I assume Ubuntu is similar. Read More »

Installing XML catalogs on Archlinux

It took me forever to find the packages on Archlinux that contained the XML catalogs files for HTML and XHTML. So: Read More »

Making a Debian Squeeze machine into a Xen virtual machine host

My attempts to get Xen working right on Debian stable (Lenny) were not really successful. Xen has had some interesting developments and the version in Lenny is just too old. Plus, the debian bootstrap scripts used to create images don't support Ubuntu Maverick... Squeeze (testing) has the newest Xen and deboostrap, so that's cool. I used the AMD64 architecture. Read More »

Configuring a Samba share with unix extensions which all users can write to

Because the unix permission model sucks, it is very hard to have a shared directory where everybody has full access to each others files. The same is true when making a shared samba archive. Luckily, samba has forcing options. Read More »

Deal Extreme: extreme suck-ass

There is this website, dealextreme.nl, which sells all kinds gadgets for low prices. I bought two SD-to-IDE addapters, so that I could put a solid state disk in my router. Read More »

Growing a qcow2 image file

First, convert it to raw: qemu-img convert system.qcow2 -O raw system.raw Read More »