One thing you definitely need to do on your Raspberry Pi is decide if it's going to be used as desktop. And if not, disable the graphics mode. What this will do is save you a sizeable percentage of available memory by not starting Xorg and iniitalise your graphics desktop environment
Use systemd To Confirm Current Boot Mode
Simply run the systemctl command with get-default option:
greys@becky:~ $ systemctl get-default graphical.target
graphical.target is the name of systemd target – a group of systemd services forming a defined system state. graphical.target means a combination of systemd services that will start graphics mode and graphics desktop environment.
Change systemd Target to Console Mode in Raspbian
We'll use the set-default option of systemctl like this:
greys@becky:~ $ sudo systemctl set-default multi-user.target
and then run get-default again to confirm the new default systemd target:
greys@becky:~ $ systemctl get-default
That's it! Reboot your Raspberry Pi now and it won't start graphics mode.