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In this video, I will tell you how to manage the GRUB2 configuration.

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So GRUB2 is used to load the kernel and the initial RAM file system, init-ramfs if you're

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on Red Hat, init-rd if you are on Ubuntu.

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GRUB2 works with an input file, which normally is an etc-default GRUB.

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All configuration settings are stored in the etc-grub.d configuration.

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Now from the input file, you can use the grub2-mkconfig-o boot-grub2-grub.cfg file.

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And that is combining the changes in the input file to the configuration file.

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Let's check it out.

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So etc-default has the file grub, and this is where it all starts.

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And here you can find the line grub-cmd-line-linux with all the different options.

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But there is also this grub-enable-bls-cfg is true.

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And this option makes it you don't write it here anymore, but you need to write it somewhere

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else.

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Let me show you.

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If you go to the boot directory, in the boot directory, you will find everything that is

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needed for booting, including the grub2 configuration directory and the loader directory.

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And in this loader directory, you have the entries, and the entries correspond to all

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the different entries in your grub boot menu.

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Now the thing is that before you would edit the etc-default grub file, but that was generic.

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What are you going to do in a configuration with multiple boot entries where you want

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to specify one specific entry?

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That is what this bls-cfg option that we have just seen is all about.

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So what you edit is in boot loader entries, and the entry, well, you need to find what

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corresponds to your current configuration.

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And in my case, that is the dash 6.6 and so on.

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This is the one.

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So if I want to change anything, like I want to remove this rh-zb and quiet, I go to the

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options line, and at the end of the options line, I'm removing my rh-zb and quiet.

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This is important to realize, because before it was more straightforward.

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You would just remove the options from the grub-cmd-line Linux, but now that we have

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grub-enable-bls-cfg, that doesn't work anymore.

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What still works is grub2-mkconfig-o boot-grub2-grub.cfg.

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That's going to write the options and make sure that your changes are saved persistently.

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So when I'm going to reboot, I should see the difference.

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It always starts with a few seconds of cursor in the upper left corner.

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This is the difference.

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I now no longer see this graphical screen hiding my boot messages.

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I actually see what is going on on my system.