Last time I was installing Ubuntu, I ran it live from usb and changed the partman
's config for the default partitioning scheme.
That was the easiest way to get full disk encryption, yet have the custom partition sizes (larger boot
, no swap
). The alternative would be using gparted and manually configuring LUKS, a far cry from simply ticking "encrypt" setting at the install (see https://askubuntu.com/a/918030/47073 for the stupid amount of steps required).
Unfortunately I forgot where the partman
's config is with the default partitioning scheme.