Re: /sbin/cryptsetup: not found on boot after Grub repair - manual mounting works

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It sounds like you need to update-grub
Assuming your grub configurations haven't changed since the original build, you're probably looking for something like this:
https://askubuntu.com/questions/145241/how-do-i-run-update-grub-from-a-livecd
Hugh
On 22/05/16 00:14, Aaron wrote:
Hello,

I would really appreciate any help to make my system boot properly again. I can manually mount my encrypted partitions and they unlock correctly, so I'm pretty sure that I haven't lost my data, but something that used to work in the Ubuntu 16.04 boot process to unlock and boot the partitions must have broken, as whenever I boot now, typing my password no longer unlocks and boots Ubuntu. Instead it says:
“cryptsetup: cryptsetup failed, bad password or options?”

If I press escape and get to the console output, it says: /scripts/local-top/cryptroot: line 1: /sbin/cryptsetup: not found over and over.

In case the history is relevant, I recently had to reinstall Windows on a dual-boot machine. That meant that I had to use boot repair to get my Grub back. I now have what seems to be a working Grub, but when I boot into Ubuntu and enter my password into the “Please unlock disk sda6_crypt”, it fails as described.
http://paste.ubuntu.com/16443425/
was the output of the boot-repair reconfiguration of Grub.

I booted in with a live CD and chrooted into my installation. I did an apt-get update and apt-get upgrade and I see the following in the output:
Processing triggers for initramfs-tools (0.122ubuntu8) ...
update-initramfs: Generating /boot/initrd.img-4.4.0-22-generic
device-mapper: table ioctl on sda6_crypt failed: No such device or address
Command failed
cryptsetup: WARNING: failed to determine cipher modules to load for sda6_crypt

I asked for help here: https://answers.launchpad.net/ubuntu/+source/cryptsetup/+question/293750 but nobody has had any ideas so far.

Any ideas would be greatly, greatly appreciated.

Kind regards,

Aaron
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