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Full Discussion: Forgotten root password
Top Forums UNIX for Dummies Questions & Answers Forgotten root password Post 302570852 by Corona688 on Friday 4th of November 2011 12:38:10 PM
Old 11-04-2011
For Linux, for instance, you could boot a Linux livecd, mount and chroot into your root partition, passwd to change root's password, then reboot. Details may vary depending on your exact distro.

There's similar procedures for other systems, but proprietary ones like AIX or HPUX would probably need their own special boot media, not a general purpose rescue CD.
 

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dialups(4)							   File Formats 							dialups(4)

NAME
dialups - list of terminal devices requiring a dial-up password SYNOPSIS
/etc/dialups DESCRIPTION
dialups is an ASCII file which contains a list of terminal devices that require a dial-up password. A dial-up password is an additional password required of users who access the computer through a modem or dial-up port. The correct password must be entered before the user is granted access to the computer. The set of ports that require a dial-up password are listed in the dialups file. Each entry in the dialups file is a single line of the form: terminal-device where terminal-device The full path name of the terminal device that will require a dial-up password for users accessing the computer through a modem or dial-up port. The dialups file should be owned by the root user and the root group. The file should have read and write permissions for the owner (root) only. EXAMPLES
Example 1: A sample dialups file. Here is a sample dialups file: /dev/term/a /dev/term/b /dev/term/c FILES
/etc/d_passwd dial-up password file /etc/dialups list of dial-up ports requiring dial-up passwords SEE ALSO
d_passwd(4) SunOS 5.10 4 May 1994 dialups(4)
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