Linux problems + Linux System Administration + Linux tips&tricks
Mounting a disk image file with partitions
Sun, 04/17/2011 - 13:22 — tomIn Linux you can easily make a backup of a whole disk, including MBR (partition table) and different types of filesystems with dd. While this is very useful, how can you access individual partitions later without "extracting" them from the image? "kpartx" is the command you need.
Asterisk "That is not a valid conference number, please try again"
Mon, 01/18/2010 - 17:03 — tomProblem: you've configured a conference call room with the MeetMe application in Asterisk, but when you call it, a voice says "That is not a valid conference number, please try again".
ET on Ubuntu 64-bit
Fri, 10/03/2008 - 00:27 — tomTrying to install Enemy Territory - Return to castle Wolfenstein on a 64-bit Ubuntu installation? I ran into 2 problems, and this is how I solved them:
Verspilde ruimte door oude Nautilus thumbnails in .thumbnails map
Sun, 09/07/2008 - 02:44 — tomAls je Gnome gebruikt, en in je ~/.thumbnails map gaat kijken, zou je kunnen vinden dat er tientallen of zelfs honderden megabytes aan nutteloze thumbnails in zit. Deze thumbnails kunnen er zijn omdat de originele bestanden niet via nautilus verwijderd werden, of omdat ze op verwisselbare media staan.
Afbeeldingen van digitale camera roteren en verkleinen
Sun, 09/07/2008 - 01:51 — tomM'n digitale camera (een Canon Powershot A550), heeft de leuke feature om de fysieke oriëntatie van de camera vast te leggen in de EXIF informatie bij elke foto. Dat is zeer handig als je software daar rekening mee houdt. Nooit meer foto's roteren voordat je ze goed kunt bekijken!
Rotating and resizing pictures
Sat, 09/06/2008 - 19:46 — tomMy digital camera (a Canon Powershot A550) has the nice feature of saving the orientation of the picture in the EXIF information (it has a sensor to detect this at the time you take a picture). Some software, like Eye Of Gnome seems to automaticaly show the picture in the correct orientation.
nautilus .thumbnails directory wasting space with old thumbnails
Sat, 09/06/2008 - 05:31 — tomIf you look at your ~/.thumbnails directory in gnome, you might find out that there are tens or even hundreds of megabytes wasted to thumbnails of files that aren't on your system (thumbnails of files that have been moved or renamed, were on removable devices, ...). Since I'm always running out of diskspace, I'd like to "fix" that. There are several "easy" solutions: delete the whole contents of the directories in .thumbnails. But then the "good" thumbnails are gone too, and they all need to be rebuild while you're browsing your filesystem.
