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Running Ubuntu 22.04 LTS and I accidentally deleted initrd.img of ONE kernel and vmlinuz of the OTHER kernel. I can not boot the OS up, not even in recovery mode. How do I restore either initrd.img or vmlinuz of either kernels so I can boot up? I have a USB with a working Ubuntu live OS, it boots up fine. The harddrive is encrypted with LUKS too btw. All help greatly appreciated, I need to recover it ASAP for work. Thank you all.

Pacman
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  • You should be able to chroot into system & reinstall kernel & grub. Often easier with Boot-Repair, but since encrypted, you have to mount LVM & decrypt it before running any updates, so /, esp, & /boot can be seen. In advanced options choose reinstall grub & new kernel. https://help.ubuntu.com/community/Boot-Repair &
    https://sourceforge.net/p/boot-repair/home/Home/ & https://askubuntu.com/questions/63594/mount-encrypted-volumes-from-command-line chroot: https://askubuntu.com/questions/719409/how-to-reinstall-grub-from-a-liveusb-if-the-partition-is-encrypted-and-there-i-     – oldfred Jun 05 '22 at 16:58
  • Please tell me how to mount LVM and decrypt it? – Pacman Jun 07 '22 at 23:23
  • See links in first comment. – oldfred Jun 08 '22 at 02:49

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