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UNIX for Dummies Questions & Answers
HELP ME HELP!!!! I can't Log in as root
Post 19672 by Kelam_Magnus on Monday 15th of April 2002 12:20:25 PM
04-15-2002
password corrupted and reboot to single
You may have to reboot to single user mode.
shutdown -ry now and stop it at the interrupt and boot to single user mode. Your shutdown command may have an option to come back to single without interruption from the keyboard.
However, since you can't loging as root. You may have to power off and back on to get to single and use the interrupt method above.
Regarding the password file.
You can do a few things. What are the permissions on your /etc/passwd file? If you can replace it with a backup of the passwd that would be good. If it is truly corrupted. You can just create a new one by hand. Perform an "cat /etc/passwd" then note the lines that are system Ids. Create a new passwd file with vi with just the system IDs.
On my OS there is another minimal passwd file that is under a subdirectory of /etc, /etc/opt/dce/passwd_override.
I don't expect yours to be in the same place, or possibly to have one of these, but it is worth a try.
If you have something like this copy it into place.
shutdown -ry now and stop it at the interrupt and boot to single user mode. Your shutdown command may have an option to come back to single without interruption from the keyboard.
However, since you can't loging as root. You may have to power off and back on to get to single and use the interrupt method above.
Regarding the password file.
You can do a few things. What are the permissions on your /etc/passwd file? If you can replace it with a backup of the passwd that would be good. If it is truly corrupted. You can just create a new one by hand. Perform an "cat /etc/passwd" then note the lines that are system Ids. Create a new passwd file with vi with just the system IDs.
On my OS there is another minimal passwd file that is under a subdirectory of /etc, /etc/opt/dce/passwd_override.
I don't expect yours to be in the same place, or possibly to have one of these, but it is worth a try.
If you have something like this copy it into place.
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LEARN ABOUT MINIX
pwconv
pwconv(1M) System Administration Commands pwconv(1M) NAME
pwconv - installs and updates /etc/shadow with information from /etc/passwd SYNOPSIS
pwconv DESCRIPTION
The pwconv command creates and updates /etc/shadow with information from /etc/passwd. pwconv relies on a special value of 'x' in the password field of /etc/passwd. This value of 'x' indicates that the password for the user is already in /etc/shadow and should not be modified. If the /etc/shadow file does not exist, this command will create /etc/shadow with information from /etc/passwd. The command populates /etc/shadow with the user's login name, password, and password aging information. If password aging information does not exist in /etc/passwd for a given user, none will be added to /etc/shadow. However, the last changed information will always be updated. If the /etc/shadow file does exist, the following tasks will be performed: Entries that are in the /etc/passwd file and not in the /etc/shadow file will be added to the /etc/shadow file. Entries that are in the /etc/shadow file and not in the /etc/passwd file will be removed from /etc/shadow. Password attributes (for example, password and aging information) that exist in an /etc/passwd entry will be moved to the corre- sponding entry in /etc/shadow. The pwconv command can only be used by the super-user. FILES
/etc/opasswd /etc/oshadow /etc/passwd /etc/shadow ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
passwd(1), passmgmt(1M), usermod(1M), passwd(4), attributes(5) DIAGNOSTICS
pwconv exits with one of the following values: 0 SUCCESS. 1 Permission denied. 2 Invalid command syntax. 3 Unexpected failure. Conversion not done. 4 Unexpected failure. Password file(s) missing. 5 Password file(s) busy. Try again later. 6 Bad entry in /etc/shadow file. SunOS 5.10 9 Mar 1993 pwconv(1M)