Running CentOS 7 minimal, you may find it inconvenient that the screen blanks after around 10 minutes. Below is how you can disable it.
Edit the grub configuration file:
sudo vim /etc/default/grub
On the line starting:
Add the following:
Once done. Save and exit the file.
Now we need to update grub.
On BIOS set based systems do:
grub2-mkconfig -o /boot/grub2/grub.cfg
On UEFI set based systems:
grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg
You can now reboot and screen blanking should be disabled.