[HowTo] make a crash-proof backup in Manjaro for your entire system

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I’m starting the process of replacing Windows (with Manjaro KDE) for my parents and my partner’s PC’s (x3 migrations)… I have a couple questions that may help flush out this tutorial. Apparently I missed adding the GRUB edits from the “How to make a Cold System Backup” section to my notes :man_shrugging:

  1. Step #5 's edits occur within the /etc/default/grub file, correct? i.e. $ sudo nano /etc/default/grub
  2. Just so I fully understand… is Step #6’s $ sudo update-grub required because of the changes made in Step #3 to /etc/grub.d/40_custom, Step #5 to /etc/default/grub, or would changes to either/both files require grub to be updated?