Create a .Xmodmap
file in user directory: nano ~/.Xmodmap
keycode 49 = less greater less greater bar brokenbar bar
keycode 94 = dead_circumflex degree dead_circumflex degree U2032 U2033 U2032
Apply changes with this command: xmodmap ~/.Xmodmap
After a reboot those changes are revoked. To apply those changes on every startup, add this command to the ~/.xinitrc
file: echo "xmodmap ~/.Xmodmap" >> ~/.xinitrc