I wanted to copy many files in /var folder and it made me slow to use the console (because the owner is root) so I changed the owner of /var
folder and all if its subfolder to my user.
After restarting my system, my system can't start and throw low graphic error and it said none of your devices can not be detected.
So I go to terminal and try to install my graphic driver but while installing I got these error:
/usr/bin/mandb: can't chmod /var/cache/man/nl/CACHEDIR.TAG :operation not permitted
How should I solve this? I use sudo to install driver
/var
like that! – George Udosen Oct 10 '17 at 22:33