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Special Forums UNIX Desktop Questions & Answers Administrator locked out - Ubuntu 11.10 Post 302593101 by Corona688 on Wednesday 25th of January 2012 03:27:05 PM
Old 01-25-2012
When GRUB loads, select "recovery mode" or "single user mode" instead of your usual boot. This should put it into a root prompt without needing a password, allowing you to run 'passwd', which will ask you for a new password twice, and set root's password if they match.

Why are you logging into root all the time, anyway? Make an account to play with, so if you mess up something like this, you still have root to fix it. That's mostly what root's for.
 

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vipw(1B)					     SunOS/BSD Compatibility Package Commands						  vipw(1B)

NAME
vipw - edit the password file SYNOPSIS
/usr/ucb/vipw DESCRIPTION
vipw edits the password file while setting the appropriate locks, and does any necessary processing after the password file is unlocked. If the password file is already being edited, then you will be told to try again later. The vi(1) editor will be used unless the environment variable VISUAL or EDITOR indicates an alternate editor. vipw performs a number of consistency checks on the password entry for root, and will not allow a password file with a "mangled" root entry to be installed. It also checks the /etc/shells file to verify the login shell for root. FILES
/etc/ptmp /etc/shells ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
passwd(1), vi(1), passwd(4), attributes(5) SunOS 5.10 14 Sep 1992 vipw(1B)
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