User: ~/.local/share/applications/mimeapps.list System: /usr/share/applications/defaults.list Bu dosyadaki xxxx.desktop şeklindeki ifadenin "xxxx"in /usr/share/applications/xxxx.desktop şeklinde bir dosyası olması lazım.

mimeapps.list

[Added Associations]
x-scheme-handler/http=exo-web-browser.desktop
x-scheme-handler/https=exo-web-browser.desktop
image/jpeg=gthumb.desktop;
x-scheme-handler/file=exo-file-manager.desktop
x-scheme-handler/trash=exo-file-manager.desktop
x-scheme-handler/mailto=exo-mail-reader.desktop
application/javascript=gvim.desktop;
text/plain=gvim.desktop;
application/x-wine-extension-inf=gvim.desktop;

[Default Applications]
text/plain=gvim.desktop
application/x-wine-extension-inf=gvim.desktop
application/msword=libreoffice-writer.desktop
application/excel=libreoffice-calc.desktop
application/msexcel=libreoffice-calc.desktop

video/3gpp=vlc.desktop
video/dv=vlc.desktop
video/fli=vlc.desktop
video/flv=vlc.desktop
video/mp2t=vlc.desktop
video/mp4=vlc.desktop
video/mp4v-es=vlc.desktop
video/mpeg=vlc.desktop
video/msvideo=vlc.desktop
video/ogg=vlc.desktop
video/quicktime=vlc.desktop
video/vivo=vlc.desktop
video/vnd.divx=vlc.desktop
video/vnd.rn-realvideo=vlc.desktop
video/vnd.vivo=vlc.desktop
video/webm=vlc.desktop
x-content/video-dvd=vlc.desktop
x-content/video-vcd=vlc.desktop
x-content/video-svcd=vlc.desktop