How to type Greek characters on the XO-1s
Because nothing is as easy as it looks, the insertion of Greek characters in the keyboard of the 30 already bought XO-1 laptops proved to be nothing but an automatic process. After our initial failure to write in Greek, the exchange of dozens of emails and a fruitless communication with the international OLPC team, we finally made it. We suggest you follow what seems to be the simplest and most easy-to-use process at the moment:
Starting from your Home view, select the Terminal application and type
nano .kbd
This will open up a blank file in which you type the following two lines:
XKB_LAYOUT=”us,gr”
XKB_VARIANT=”none-option grp:alt_shift_toggle
Press Ctrl+X and then Y to save file and exit the editor.
Press Alt+Ctrl+Erase to restart Sugar. Greek fonts are now available in all applications simply by pressing Alt+Shift.
(Reference http://www.republic.gr/en/olpc/?p=9)