Unable to "su" or log in as root
Greetings. Please forgive me if this topic has been covered previously. I have been Googling all day, and so far, have not been able to find a resolution to my problem.
I am using Debian Sarge. I can SSH to my server and log in through the console and su to any user but root. When I try to su, I get the message "su: Authentication service cannot retrieve authentication info. Sorry."
I tried rebooting the server to log in at init level 1, and was not able to do so. Rebooting produces a number of "invalid" user messages concerning root, such as "Starting MTA: chown: 'root:Debian-exim' : invalid user".
Unfortunately, since I cannot su, I do not have access to the server's log files, nor most of the config files.
Please help! Any assistance/suggestions/criticisms will be greatly appreciated.
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