tee is not necessary in that command.
You just need to edit the file
/sys/class/backlight/intel_backlight/brightness to add
937, as the file is only writeable by the owner,
root (user with UID 0), any manner that can do exactly that would suffice.
You could just do:
sudo bash -c 'echo "937" >/sys/class/backlight/intel_backlight/brightness'
In that command,
tee is being run with
sudo i.e. being run as
root as the file
/sys/class/backlight/intel_backlight/brightness in only writable by
Even you can start an interactive-login session of your
and open-write-close the file with any command or your editor of choice (and later exit that session), but that would be clumsy and unnecessary as you want to run just a single command.
Also you don't need the
echo "937" | sudo tee /sys/class/backlight/intel_backlight/brightness