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Tuesday, January 24, 2012

Crux and Mercurial view

I've spent quite some time trying to make hg view to work on my Crux. All time I got error message:

hg view /bin/sh: hgk: command not found

I could not understand what going on. I enable hgk in /etc/mercurial/hgrc or ~/.hgrc. I specified the full path to in there as well. I even modify default python path. It didn't work.

After some time of googling, changing various variables I found somewhere (probably on Mercurial page), that some Linux distro missing hgk even if they provide Now I know that Crux is one of them. I copied hgk from contrib directory in source package to /usr/bin and now hg view works fine.

Saturday, January 14, 2012

Aptitude advance usage

Some time ago on the Debian mailing list there was a discussion (there are many discussion over there ;). That one was extremely interesting, not because of the problem (I don't remember it), but because of the Jörg-Volker. Peetz mail with information on advance aptitude usage:

"I would try the following:

- to find out what is installed
    aptitude search '~iapache'

- why it is installed
    aptitude why apache2-mpm-worker
  maybe this one is only recommended by another package

- and what depends on this package
    aptitude search '~i~Dapache2-mpm-worker'

- finally, see what would happen, if it is removed:
    aptitude -s purge apache2-mpm-worker"

In the same thread Bernd Semler suggested following command:

apt-cache rdepends $packagename

The original thread can be found here:

Monday, January 09, 2012 to install Debian on XenServer/XCP

Recently, I've needed to install many Debian VMs onto XenServers and, of course, wanted to automate it. One of my colleagues pointed that rather use existing tools like Cobbler I should take opportunity of working with world leading XenAPI developers and learnt it by writing some code. I took that advice and started to write a python script.

During that I decided that I could improve XenAPI documentation. I spent some extra time on my program and tried to write the code clear and with as many comments as possible, so other can learn from it and reuse it. I hoped to write even more documentation (some tutorial) based on my experiences, unfortunately I haven't had enough time.

Please find short documentation on Xen wiki:

and code on GitHub:

The script is called XenDebian, but with minor modification (new preseed file and change distro name in few places) you should be able to use it with Ubuntu. With a few more modification it should works for any distribution.

Finally, thanks to Project Kronos you would be soon able to install use XenDebian to install many Debian on Debian!

Wednesday, January 04, 2012


Recently I wrote a very small script to apply XenServer patches from command line.


unzip $1
filename=`basename $1 .zip`.xsupdate
echo "Applying $filename"
xe patch-pool-apply uuid=`xe patch-upload file-name=$filename`

To use if first you need to download a patch (you might try to find any new patch here), and next use the script: