It all started when I tried to factory reset my computer. I closed the "resetter" app while it's resetting. Now I ended up with CLI.
I tried to install Ubuntu desktop GUI using
sudo apt-get ubuntu-desktop
but it didn't work. It says that they're unable to fetch archives
I have tried to update using
apt-get update but it says
Reading package lists...Done E: Could not open lock file /var/lib/apt/lists/lock -open (13: Permission denied) E:Unable to lock directory /var/lib/apt/lists W: Problem unlinking the file /var/cache/apt/pkgcache.bin -RemoveCaches (13: Permission denied) W: Problem unlinking the file /var/cache/apt/srcpkgcache.bin - RemoveCaches (13: Permission denied)