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Full Discussion: Ubuntu karmic koala 9.10
Operating Systems Linux Ubuntu Ubuntu karmic koala 9.10 Post 302385176 by pludi on Thursday 7th of January 2010 08:51:18 AM
Old 01-07-2010
Again: by default the root user on Ubuntu is made unavailable by setting a random password. That's because the philosophy of Ubuntu is not to confuse the user with differentiating between a regular user and root.

For that reason, Ubuntu uses sudo instead of su for anything that requires administration privileges. sudo, by default, asks for the password of the user trying to run a command, instead of the password of the user you're trying to run as. So if you're logged in as user 'bdiwakarteja', sudo will ask for the password of the user 'bdiwakarteja', not for the root password.
 

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dsenableroot(8) 					    BSD System Manager's Manual 					   dsenableroot(8)

NAME
dsenableroot -- enables or disables the root account. SYNOPSIS
dsenableroot [-d] [-u username] [-p password] [-r rootPassword] DESCRIPTION
dsenableroot sets the password for the root account if enabling the root user account. Otherwise, if disable [-d] is chosen, the root account passwords are removed and the root user is disabled. A list of flags and their descriptions: -u username Username of a user that has administrative privileges on this computer. -p password Password to use in conjunction with the specified username. If this is not specified, you will be prompted for entry. -r rootPassword Password to be used for the root account. If this is not specified for enabling, you will be prompted for entry. EXAMPLES
-dsenableroot Your username will be used and you will be queried for both your password and the new root password to be set to enable the root account. -dsenableroot -d Your username will be used and you will be queried for only your password to disable the root account. -dsenableroot -u username -p userpassword -r rootpassword The supplied arguments will be used to enable the root account. -dsenableroot -d -u username -p userpassword The supplied arguments will be used to disable the root account. Mac OS August 08 2003 Mac OS
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