Want to delete all discussion pages on my wiki. All other pages should stay.
Topic on Project:Support desk
You'll have to take a look at Manual:DeleteBatch.php.
See also Manual:nukeNS.php
Ahmad, I installed the extension, but I don't know, how now to give it the list with the artciles, I want to delete.
Try NukeNS.php mentioned earlier, this is significantly simpler.
Ok, but where is it to download? Or how do I install it NukeNS?
It is a PHP script file which should already be present inside your <mediawiki_folder>/maintenance directory. See Manual:Maintenance scripts for details on running such scripts.