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+## How To Change Default Application From The Command Line ##
+
+xdg-open basically just looks to see which desktop environment you have and then runs gnome-open, gvfs-open, xfce-open, to open the default application for a particular
+filetype. However, xdg-open works perfectly without desktop environment and therefore can be used with the i3 window manager. 
+
+#### Example: Set Transmission as default application to open magnet file. ####
+
+
+* Find out the MIME type string. For file MIME types, you can find it out with file command:
+
+       ` $ file -i Broken_Blossoms.webm `
+
+  This provides the output as: 
+  
+  `Broken_Blossoms.webm: video/webm; charset=binary`
+
+    For the above file, MIME type is **video/webm**.
+
+    For URI handlers, the type is x-scheme-handler/<scheme>, where <scheme> is the part of URI before colon, e.g. "http", "mailto" "irc" or "magnet". Following are examples of valid MIME types:
+
+    `x-scheme-handler/http`
+    `x-scheme-handler/irc`
+    `x-scheme-handler/magnet`
+    `x-scheme-handler/mailto`
+
+* Find out the name of the application .desktop file.
+
+    Installed .desktop files live under **/usr/share/applications**. 
+
+        `$ grep "Transmission" -l -r /usr/share/applications`
+        `/usr/share/applications/transmission-gtk.desktop`
+        `$`
+
+    In case you have "strange" application that may not have the file at all, you can always create one. Easy way would be to copy an existing one, 
+    rewrite fields you understand and remove those you don't. Refer to the specification for details.
+
+* Make the assignment using **xdg-mime** command:
+
+        `$ xdg-mime default transmission-gtk.desktop x-scheme-handler/magnet`
+
+    Note that no matter where the file actually is (/usr/share/applications, ~/.local/share/applications...), you always use only the name, not the full path.
+
+* Normally the command will not output anything. If you want to verify what you just did or see what is currently assigned to any MIME type without opening it:
+
+        `$ xdg-mime query default x-scheme-handler/magnet`
+        `transmission-gtk.desktop`
+        `$`
+
+##### Note 1: ##### 
+
+If you want to check out other MIME types, you can look at /etc/mime.types. It does not contain all types in the world; for example the URI handlers,i
+but it could be used for "aggressive" form of handling the associations. For example:
+
+`grep ^video/ | cut -d\t -f1 | xargs xdg-mime default vlc.desktop`
+
+would associate all known video formats to VLC.
+