Disabling sleep on rasberry pi3

Question

Is there a command line prompt to disable sleep? Or is there a file I can access on the Raspberry Pi to change?

Answer 1

Force the screen to stay on:

From an SSH session in PuttySSH or a terminal session on the Raspberry Pi itself:

$ sudo nano /etc/lightdm/lightdm.conf

Add the following lines to the [SeatDefaults] section:

# don't sleep the screen
xserver-command=X -s 0 dpms

CTRL+x to exit, Y to save then enter to accept the filename