LinuxQuestions.org - Notes on Linux

I leave notes here that I find particularly worth remembering myself.

Howto install selected Debian packages from other releases (apt-pinning)

Posted 11-11-2011 at 07:44 AM by bittner (Notes on Linux)

Mixing releases can be necessary when you need a more up-to-date version of a software in a system running on package management and not (yet) providing later package versions.

For example, we need the latest git on your Debian Lenny system, because you updated your Eclipse plugins, and now the git integration refuses to work with your old client. Shoot! Let's check what to do to fix this...

Things to do

Edit /etc/apt/sources.list (or create/edit a file in /etc/apt/sources.list.d/

...

bittner

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Howto automate interactive Debian package installations (debconf preseeding)

Posted 06-08-2010 at 07:44 AM by bittner (Notes on Linux)
Updated 06-08-2010 at 06:59 PM by bittner

Tags administration, debian, package

Fully automatic installations make sense when you need to install a vast number of machines. For Debian (but not limited to it) there is the FAI project that helps you with those kind of undertakings.

When FAI uses Debian packages (i.e. .deb files) for installation the automatic installation process gets into trouble when such a package asks for manual configuration interactively. Really, this is not specific to FAI: The Debian installer (the installation wizard guiding you through...

bittner

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Howto build your own Debian repository

Posted 06-01-2010 at 05:04 AM by bittner (Notes on Linux)
Updated 06-07-2010 at 07:08 AM by bittner (added reference (background reading))

Tags administration, debian, packages

If you write software for Linux and you write them for Debian systems (Debian, Ubuntu, and others) you may want to provide your software as .deb installation packages. And one day eventually you will want to set up a repository so others can download and install your software without fuzz.

If you look at a Debian mirror (e.g. http://ftp.debian.org/debian/) you will find out one day that packages and meta information is split up into two main directories on the root level:

dists

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bittner

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Unix runlevel scripts: Finally the first character makes sense!

Posted 05-29-2010 at 04:12 PM by bittner (Notes on Linux)

Tags administration, script

You probably know Unix runlevel scripts. They start with an S or a K, and they are typically located at /etc/rcX.d/ with X being the runlevel (0-6) the script is supposed to run at. For example:

Code:

~$ ls -l /etc/rc5.d/*cups
lrwxrwxrwx 1 root root 14 2009-12-31 16:35 /etc/rc5.d/S50cups -> ../init.d/cups

To be precise those S- and K- files are typically symbolic links to scripts that reside in /etc/init.d/, and from my experience I felt they work as follows:

Any symlink

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bittner

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