Lubuntu/Ubuntu: Add Greek keyboard to Layouts
setxkbmap -option grp:switch,grp:alt_shift_toggle,grp_led:scroll us,gr
or
setxkbmap -option grp:switch,grp:alt_shift_
setxkbmap -option grp:switch,grp:alt_shift_toggle,grp_led:scroll us,gr
or
setxkbmap -option grp:switch,grp:alt_shift_