Changing user login in single user mode?

Hi my computer (server10.3) is no longer booting up (stops at the blue screen just before the login).
only 2 things have changed since last time restarted
1) changed user login in in the prefs to automatic as my name
2) installed a security update
I am wondering - if I can get into single user mode - whether i can change or force the login details
thanks

Hi John,
   You can get into single user mode by depressing <Command>-s after the chime and holding it until you're in single user mode. Once you get there, I recommend that you run the following:
/sbin/mount -uw /
/usr/sbin/diskutil repairPermissions /
Repairing permissions is the classic first thing to do when you have problems after an update. After that, if we can help it will depend on your posting the error messages that are printed to screen before the login. If they get scrolled off the screen, you should be able to get them again with the command "dmesg".
Gary
~~~~
   The system was down for backups from 5am to 10am
   last Saturday.

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Changing user login in single user mode?

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