ELevate blocker: GRUB is missing

Symptoms

You encounter one of the following warnings when running the elevate-cpanel script.

* 2024-03-04 21:08:52 [WARN] *** Elevation Blocker detected: ***
  File "/etc/default/grub" does not exist!

* 2024-04-19 21:29:50 [WARN] *** Elevation Blocker detected: ***
The GRUB2 config file is missing.

Description

This issue occurs when the GRUB configuration files are missing.

Workaround

1. Access the server's command line as the 'root' user via SSH or "Terminal" in WHM.
2. Run the following command and record the output.

   grubby --info=DEFAULT|grep args|cut -f2 -d '"'

3. Create the /etc/default/grub file.

   touch /etc/default/grub

4. Open /etc/default/grub in your preferred text editor.
5. Ensure the contains the following entries.

   GRUB_TIMEOUT=5
   GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
   GRUB_DEFAULT=saved
   GRUB_DISABLE_SUBMENU=true
   GRUB_TERMINAL="serial console"
   GRUB_CMDLINE_LINUX="$commandlineargs"
   GRUB_DISABLE_RECOVERY="true"

   Please note that $commandlineargs must be replaced with the output from the grubby command.
6. Save the changes and exit the text editor.
7. Backup the grub.cfg file if it exists.
   • BIOS

     cp -a /boot/grub2/grub.cfg{,.$(date +%s)}

   • EFI

     cp -a /boot/efi/EFI/redhat/grub.cfg{,.$(date +%s)}

8. Rebuild the grub.cfg file.
   • BIOS

     grub2-mkconfig -o /boot/grub2/grub.cfg

   • EFI

     grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg