How to keep the screen always on

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Question ：

How to keep the screen always on?

Solution ：

The screen saver can be turned off with the following Settings. Open lightdm.conf

sudo nano /etc/lightdm/lightdm.conf 

Find the following code

#xserver-command=X

Be revised as

xserver-command=X -s 0 -dpms 

Take effect after reboot

sudo reboot 

PS:The user can also set the HDMI interface screen to close and open with the following command

Close：

vcgencmd display_power 0  

Open：

vcgencmd display_power 1