For a gnome system:
$ gconftool-2 --set /desktop/gnome/interface/cursor_blink --type boolean False
$ gconftool-2 --set /apps/gnome-terminal/profiles/Default/cursor_blink --type boolean False
$ gconftool-2 --set /apps/gnome-terminal/profiles/Default/cursor_blink_mode --type string off
Changes take effect immediately, there is no need to restart running applications
from
http://ptspts.blogspot.co.uk/2011/08/ho ... gnome.htmlI only needed the first one
hth