how to login the single user mode

[syno]

I have an old HP9000 800/G50 server ,but I cannot remember the password of root.
I try to reboot the server to access the single mode, failed.
the situation is as below:
1.Enter the ten seconds interrupt,press enter
2.boot to the IPL mode,
3.IPL>hpux -is
<-----after waiting a few secons,return to the prompt of IPL
4.I try to use another command to boot to single user mode, still failed.
IPL>hpux -is boot(:0) /stand/vmunix
<---It returns as below
boot
:disc3(52.6.0;5) /stand/vmunix
disc3(52.6.0;5) /stand/vmunix:cannot open,or not execute
Exec failed:No such file or directory

IPL>>----NOT ACCESS TO SINGLE USE MODE,SO I cannot reset the root passward.
Could someone help me to give a solution?Thanks,

[donne007]

hi syno
Try using From The
MAin Menu> sea ipl
and once your system points out the Boot Path
boot using the same .. like
Main Menu> Bo Pn
wher n is the Boot Path No.
And go for Inteactive mode, And try from isl>hpux -is (and NOt from ipl)
Let Hope it wrks.

Good Luck
Asif

[Ravi_8]

Hi,

IPL> hpux -iS (capital s not the small s)
will take you into single user mode

[tarek_3]

if you have a trusted system
and you restrict the login to single user mode
try to create a crush on your system,
then the system will reboot in a single user mode

[Eugeny Brychkov]

First of all try 'hpux ll' to see what do you have in the /stand (lvol1) subdirectory. Check executable size. BTW, are you able to boot in multi-user mode? If not then vmunix is corrupt
Eugeny

[Steven E. Protter]

The above instructions are good, but it is possible to password protect single user mode. If that is done, I know no way to reset root password.

I know few people outside of government service who actually do this. Physical access to the computer room needs to be controlled or you have no security anyway.

Steve

[Martin Johnson]

Try booting iin maintenance mode:

hpux -lm

mount /etc and /usr, then edit /etc/passwd. If a trusted system, edit /tcb/files/auth/r/root.
Remove the password from the line that looks something like this:

:u_pwd=UldaUadfdaI:
remove between the "=" and the ":"

UldaUadfdaI

HTH
Marty

[Bill McNAMARA_1]

from the message no kernel is found so nothing will boot.
ISL does exist on the disk you've BO'd from, (as you get prompt) so either you've hosed your / or /stand filesystem or the kernel.

hpux ll

will show if there is any bootable kernel file. If there is try booting from it.

Later,
Bill

[Armin Feller]

Hi,

do following:

ISL> hpux -lm

# vgchange -a y /dev/vg00

# lvlnboot -v /dev/vg00

If no boot logical volume configured do:

# lvnboot -b /dev/vg00/lvol1
# lvlnoot -Rv /dev/vg00

# mount /dev/vg00/lvol1 /stand
---> moved original kernel back in place !!!

# cd /
# shutdown -r 0

Best regards,
Armin

[Frank Slootweg]

Can you boot the system normally?

If so, let it boot normally and *exactly* note down the line which looks *like*:

:disc3(52.6.0;5)/stand/vmunix

Then shutdown the system and reboot it to "ISL> ".

Now enter "hpux -is " (without quotes) and the line which you have noted down, but without the colon (":"), i.e. in the example the command would be:

ISL> hpux -is disc3(52.6.0;5)/stand/vmunix

The reason for this 'difficult' method is that if the default 'device file (see hpux(1M) manual page) is not set up correctly, you will have to specify the *full* device file ("disc3(52.6.0;5)/stand/vmunix " in the example).