On Thu, Feb 22, 2018 at 10:12:44PM +0100, MarkusHiereth wrote: > > Has anybody an idea about the purpose of such an option? > Hi Markus,
I have seen this used on old UNIX or BSD systems to create a second root account. For example, the standard default root account is set to use some old sh or csh implementation. Somebody installs bash (probably in /usr/local) and wants to be able to log in as root and have that be the default shell. However it might be dangerous to change root's default shell, so you create a second account called 'toor' with user ID 0 and the same home directory as root and set its default shell to /usr/local/bin/bash (or whatever). Then administrators are able to log in as 'toor' to get bash as the default shell. I have never implemented such a scheme myself, I just recall having seen it on some very old systems I used a long time ago. Regards, -Roberto -- Roberto C. Sánchez
