On 08/07/2018 09:06 PM, Joe wrote: > On Tue, 7 Aug 2018 12:11:50 +0100 > Jonathan Dowland <j...@debian.org> wrote: >> If you set a root password in d-i (as it asks you to), it doesn't >> install sudo. If you try to set a blank root password, it locks the >> root account, installs sudo and sets up the user you created with sudo >> access. >> > > OK, I've never tried that. I always want the option of connecting a > monitor and actually logging in as root, just in case of > difficulties. I believe that some boot problems are not solveable > without being able to provide a root password, long before the > operating system can provide su or sudo.
In those truly catastrophic cases, you can set init=/bin/sh in the bootloader kernel line, which will boot you into a root shell.