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Thanks for the reply. It wasn't long at all before I had aborted the installation. It should have never proceeded to do anything before I continued to the next step. For one thing, the Ubiquity developers should have realised that many people only upgrade from LTS to LTS so might not know about the new changes in encryption. In previous releases, I was ...


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How much time did the failed/aborted installer spend writing to the drive? It would take a long time to overwrite all 600GB, and I'm not sure but just setting up LUKS it may not attempt (the recommended secure practice) to overwrite with zeros before creating a filesystem - and it didn't successfully create a filesystem from the "no recognizable filesystem" ...


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Support for resizing LUKS partitions is being added right now to KDE Partition Manager. Grow support is already done in unreleased git versions and shrinking will be added soon. It will probably take a while until it reaches distributions and in particular Ubuntu but it will work at some point. Growing and shrinking LUKS in action: ...


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I tried kyodake's answer above but kept getting this error after installation of the kernel: cryptsetup: WARNING: invalid line in /etc/crypt1 -. It would then reboot into an initramfs shell. I got information from this answer that I had to unlock the encrypted volume, which was /dev/sda5 in my case, with the same name that the installed system expected. ...


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Most people don't realise that software encryption of your drive is unnecessary if they've got an SSD. Just set a hard drive password because the data in flash is almost certainly encrypted anyway, and the drive password protects the key. Check the specs of your drive to verify this.



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