Does anyone know how I can insert the Interpunct character (also known as midline decimal http://en.wikipedia.org/wiki/Interpunct ) in Ubuntu. The combination mentioned in the Wikipedia article does not seem to Work:
Alt Gr + .
Simply press CTRL + SHIFT + U, then type 00b7, i.e. the unicode value of interpunct character.
The default way to do this is given in the Ubuntu Help page: The Gtk Dead Key Compose Table. The sequence for the middle dot is: ThirdLevel Chooser + DeadKey-Cirucmflex + period or expanded: AltGr + Shift + AltGr + Shift + ^ + .. This is supposed to work even without changing keyboard options.
Compose key combinations, however, did not work reliably on my system until I set a compose key in the Keyboard Layout.
Settings > Keyboard Layout > Options > Expand Compose Key Position and choose the key you want. I chose RightAlt so now, RightAlt + Shift (now in 3rd level) + Shift + ^ + . inserts the middle dot.