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42 Monaten  Batch convert Images on Windows and Linux

06.04.2015, 18:30     Bei "alexandervolf.com | A blog about linux, web and everything."

   

I encountered a common problem when preparing images for the web (e.g. this blog), from screenshots or from renders. These are usually available as .tiff or .pnm formats or have been processed with GIMP resulting in .xcf file. Converting these to .pngs or jpegs with GIMP or some viewer software makes it a click intensive task. There are a plenty of ...
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49 Monaten  Skype mutes all sounds under Linux – fixed

04.10.2014, 08:30     Bei "alexandervolf.com | A blog about linux, web and everything."

   

I had lately the problem, that the new Skype version 4.3.0.37 mutes all other sounds (e.g. playing videos) when a notification sound is played. This is quite annoying, since skype normally notifies at all occasions, when a contact logs on, when a contact logs off….However this seems not be a genuine skype problem (thou I assume with a more ca ...
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49 Monaten  Compression Basics under Linux

29.09.2014, 09:35     Bei "alexandervolf.com | A blog about linux, web and everything."

   

Compressing files and folders on linux is not always an easy task. This is mainly due to the lack and impracticability of compressing GUI tools under linux.Basicly the most easy way is to use gnuzip (gz) in conjuncion with tar. This can be done either in 2 steps (first create a tar container and then gzip this container) or directly using the corre ...
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49 Monaten  Adding a language attribute to links – hreflang

21.09.2014, 16:06     Bei "alexandervolf.com | A blog about linux, web and everything."

   

Adding a hreflang flag to the Blog might be useful. I surely think, this could boost the page rating and make it more easily searchable. Usage is easy as can be seen in this example.There is also a wordpress plugin for adding this tag.


50 Monaten  fstab mount by UUID

07.09.2014, 16:35     Bei "alexandervolf.com | A blog about linux, web and everything."

   

I recently ran across a bug when installing Fedora 20. The installer crashed when trying to probe mdraid. This also happened when I (completely) disconnected the array from the computer. The problem was, that the installer was probing the /etc/fstab in the old fedora installation I wanted to overwrite. Here the raid array was mounted as /dev/md127 ...
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