bro after apt-get install build-essential get message package build-essential is not available
deb http://repository.maemo.org/ fremantle/sdk free non-free deb http://repository.maemo.org/ fremantle/tools free non-free
If I remember correctly, you can have any number of virtual keyboards installed (this one, portrait-keyboard, handwriting cell input, default) and switch between them by editing one setting in gconf and probably restarting hildon-input-method. No need to restart whole operating system. Probably you could add icons on home screen to switch to one keyboard or another instead of typing each time in X Terminal.
gconftool --type string -s /apps/osso/inputmethod/default-plugins/finger hildon_western_fkb #switch to default virtual keyboard kill -9 `ps aux | grep hildon-input-method | grep -v grep | awk '{print $1}'` #restart hildon-input-method daemon
gconftool --type string -s /apps/osso/inputmethod/default-plugins/finger maemo-chinese-input-pad-plugin