Hello, first of all, great guides, I’m sure a number of users will benefit greatly from clear instructions.
I’d like to make a few comments if you don’t mind:
1 - Wouldn’t it be better to have these split up in separate, more easily searchable, threads? Perhaps @deeplow can help with that. Splitting them could also be beneficial when questions about the various guides start popping up.
2 - To edit files with an editor when sudo privileges are required, it’s actually preferred to use sudoedit. You may have to set the SUDO_EDITOR variable if you want to change your editor to, let’s say nano. This can easily be done by adding the variable to /etc/environment.
Read more about sudoedit here: sudoedit(8) - Linux manual page
3 - In this case it’s preferred to remove the rhgb parameter from /etc/default/grub and then regenerate the grub configuration file:
$ sudo sed -i 's/rhgb //g' /etc/default/grub
$ sudo grub2-mkconfig -o /boot/grub2/grub.cfg