Useful when you have permission problem on which permission policykit handles. (network disk mounting power management ...)

If your problem seems related to debconf database corruption, be it of
above kind or not, the suggested fix is, quoting Joey Hess message in
#198297 bug page

By purging and reinstalling the package, you only fixed the entries for
that package. I suggest you run /usr/share/debconf/fix_db.pl as root,
which will delete all the orphaned questions. You may end up having to
repeat your answers to some debconf questions during future upgrades,
but that's a small price to pay for a consistent debconf database.

After running /usr/share/debconf/fix_db.pl as root, please look which
templates were affected,

$ diff -u /var/cache/debconf/config.dat{-old,} | grep ^[+-]Name
$ diff -u /var/cache/debconf/templates.dat{-old,} | grep ^[+-]Name

Your debconf database should be now in a consistent state and packages
configuration should succeed.

Most linux distributions use some type of mechanism to gracefully stop daemons and unmount storage volumes during a reboot or shutdown. It’s most commonly done via scripts that will wait for each daemon to shut down gracefully before proceeding to the next daemon.

As we know, sometimes servers misbehave due to things put them through, and you can quickly end up in a situation where things are going badly

Leszek Godlewski, the former developer at The Farm 51 who has ported games like Painkiller Hell and Damnation and Deadfall Adventures to Linux / SteamOS, has given another presentation on porting games to Linux.

Travelling can be enriching and inspiring, especially if you’re in a place you haven’t been before. Whether on vacation or travelling for business, one of the first things that people usually do, including myself, after arriving in their hotel room, is turn on the lights (even if daylight is still coming through the windows), jump on the bed to feel how comfortable it is, walk to the window, and admire the view. If you like what you see, sometimes you grab your camera and take a picture, regardless of reflections in the window.

Without considering geolocation metadata [1] (if enabled), reflections could be a way to get more accurate information about where a picture was taken. How could one of glass’ optical properties [2], reflection, disclose your location? Continue reading.

Un git merge ne devrait être utilisé que pour la récupération fonctionnelle, intégrale et finale d’une branche dans une autre, afin de préserver un graphe d’historique sémantiquement cohérent et utile, lequel représente une véritable valeur ajoutée.

Tous les autres cas de figure relèvent du rebase sous toutes ses formes : classique, tri-partite, interactif ou cherry picking.

It doesn't make any sense to talk about lock free data structures without covering such topics as atomic operations, memory model in programming languages, safe memory reclamation, compiler and optimizations used by them, modern CPU designs, — all of these topics will be covered more or less in this series.

strace usage example !

This is the web site for the Third Edition of Linux Device Drivers, by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman. For the moment, only the finished PDF files are available; we do intend to make an HTML version and the DocBook source available as well.

On i386, because of the dearth of general-purpose registers, the calling convention passes all arguments on the stack. This makes the vaarg implementation easy – A valistis simply a pointer into the stack, andvaargjust adds the size of the type to be retrieved to thevalist, and returns the old value. In fact, the i386 ABI reference simply specifiesva_arg in terms of a single line of code:

On amd64, the problem is much more complicated. To start, amd64 specifies that up to 6 integer arguments and up to 8 floating-point arguments are passed to functions in registers, to take advantage of amd64's larger number of registers. So, for a start, va_arg will have to deal with the fact that some arguments may have been passed in registers, and some on the stack.

How does a system call is handle in the linux kernel ?