I upgraded from Fedora 26 to Fedora 28 by using sudo dnf "system-upgrade download --releasever=28" command.

Now I can login to Gnome, but sudo is not working. When I do sudo -i, it asks for the password for my username. I login to Gnome with the same username but that password doesn't work in the terminal. Now I cannot check the wheel group or do visudo, as I don't have access.

  • Fill a bugreport – Ipor Sircer Jun 14 '18 at 9:06
  • Log in as root and examine the sudoers file to see why it does not work for you. – Kusalananda Jun 14 '18 at 10:47
  • @Kusalananda How to login as root? I didn't set any root user in fedora28. – yogeshkakde Jun 14 '18 at 11:03
  • @yogeshkakde If you didn't set a root user while installing (which is odd) or you just don't remember the password, boot into single-user mode and reset it. When grub shows the kernel that you normally boot into, select it and press e. On the next screen, go down to the kernel line that starts with linux, change the ro to rw init=/sysroot/bin/sh. Ctrl X to boot into single user mode. When the prompt comes up, enter chroot /sysroot/ and that will get you into /. Enter passwd and then enter and confirm the new root password. You can now login and become root with su -. – Nasir Riley Jun 14 '18 at 11:30

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