My common solution to boot issues that lock me out is,
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Get a USB Live distro (always good to have a backup lying around)
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Boot into live distro
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Chroot into the broken distro (Arch wiki has an article on this)
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Fix any bugs that I can find and/or reinstall the bootloader
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Test, repeat until the problem has been found and fixed
Hope it helps any newcomers!
Yeah I hate this stuff too, I usually pipe it into a file figure out what it’s doing and manually install the program from there.
FWIW I’ve never found anything malicious from these scripts but my internal dialogue starts screaming when I see these in the wild, I don’t want to run some script and not know what it’s touching malicious or not it’s a PITA.
As a linux user, I like to know what’s happening under the hood as best I can and these scripts go against that