To enable the touchpad tapping permanently , copy the `50-synaptics.conf` file to `/etc/X11/xorg.conf.d` then edit it by adding `Option "TapButton1" "1"` 

 cp /usr/share/X11/xorg.conf.d/50-synaptics.conf /etc/X11/xorg.conf.d/50-synaptics.conf

The `/etc/X11/xorg.conf.d/50-synaptics.conf` should be:



 Section "InputClass"
 Identifier "touchpad catchall"
 Driver "synaptics"
 MatchIsTouchpad "on"
 Option "TapButton1" "1"

Reboot your system