magemagick location directory

Regarding to this list of files: http://packages.ubuntu.com/precise/amd64/imagemagick/filelist

You should use this values.

$wgImageMagickConvertCommand = /usr/bin/convert $wgImageMagickIdentifyCommand = /usr/bin/identify

https://askubuntu.com/questions/338272/where-is-my-imagemagick-installed