MPE is very different from hpux.  (you don't start it with "hpux
-is", you start it with "start" etc).
usernames and security is also very different.
It is a diffferent beast entirely.
(but really fascinating and one of the best and most secure O/S's
ever made (up there with VMS and IBM's VM/VSE/MVS/OS390/ZOS.)
-Bob
  At the
"ISL>" prompt, enter "hpux -is". This will boot the system
into single user mode and automatically log you in as "root".
-------
When your in the system, you can change the root password:
"passwd root"
Just reboot he system "shutdown -r now" and let it follow the
normal boot process. 
So is MPE that similar to HP-UX? I thought it would be something
semi-bizarre so I didn't pursue it at all (also the difficulty of
finding a 3k and MPE media).
Had it slotted in with OS/400 in the "things that will be a huge
headache and very expensive, so don't bother" class... 
 
--
bbrown at 
harpercollege.edu   ####  ####    Bob Brown - KB9LFR
Harper Community College   ##  ##  ##    Systems Administrator
Palatine IL USA            ####  ####    Saved by grace