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I tried to use this very old post as a model to install directly to the LUKS mapper instead of to an LVM set on top of the mapper, but the Ubuntu 21.10 installer explicitly forbids installing to a mapper.

The basic TLDR of the old post was:

  1. Boot in try it mode
  2. Manually create the LUKS partition
  3. Do a luksOpen on the partition
  4. Point the installer at the "opened" partition
  5. Post install click "continue testing"
  6. Back in shell, make a chroot
  7. In the chroot setup fstab and grub
  8. Close out the chroot and reboot

Of course I'm failing on #4 since the installer wont let me install to a mapper device.

So, is there any way to use the single-partition setup that "Install alongside Windows" uses, but with LUKS enabled? Possibly through scripted installs? This is how I've gotten past some of the more exotic Microsoft prohibitions previously.

Dan
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    Does this answer your question? [How do I install Ubuntu with full disk encryption without having to "erase everything"?](https://askubuntu.com/questions/1246401/how-do-i-install-ubuntu-with-full-disk-encryption-without-having-to-erase-every). It's not that complicated! You can use the installer without having to use chroot or touch the terminal – Nmath Mar 05 '22 at 06:50
  • I don't see where you've said what installer you're talking about. Ubuntu 21.10 has multiple ISOs available that use different installers; but you've not said if you're talking about a `ubiquity` installer/ISO, `subiquity` installer/ISO etc. The `ubiquity` installer has been available for many releases (decade+) but you've provided no specific details as to what you actually tried & had issues with. Please clarify. – guiverc Mar 05 '22 at 07:05
  • @Nmath, yes it does. Thanks. I had found that post earlier but didn't realize that it would work with a Win10 EFI install. Having done the install 3 times now, the post makes much more sense. Thanks for suggesting I reread it. – Dan Mar 05 '22 at 09:09
  • @guiverc, Think this post is a duplicate. It was `ubiquity` I think. Whatever the default installer is for `ubuntu-21.10-desktop-amd64.iso` – Dan Mar 05 '22 at 09:10
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    Yep `ubiquity` is the default desktop installer for 21.10 (most *flavors* too but not Lubuntu or Ubuntu-Studio which use `calamares`), Ubuntu server installer being `subiquity` (FYI: There was the *canary* desktop installer ISO too that uses the desktop version of `subiquity` but it wasn't released thus it's *canary* status; it wasn't ready for 21.10) – guiverc Mar 05 '22 at 09:11

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