[ubuntu-in] System administrator to enable user sharing- how?

[74yrs old]

Lists.
How to create administorID and password or  any alternative solution to
overcome the problem noted below. In ubuntu, it appears there is no
provision to  create password for "root" or "administrator".whereas in other
distros there is provision to create password for "root". Since I newbie to
Ubuntu 8.04 I request valuable guidance. *

nitializing nautilus-share extension
seahorse nautilus module initialized
** (nautilus:6057): WARNING **: Unable to add monitor: Not supported
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net
usershare' returned error 255: net usershare: cannot open usershare
directory /var/lib/samba/usershares. Error No such file or directory
 Please ask your system administrator to enable user sharing.
Nautilus-Share-Message: Called "net usershare info" but it failed: 'net
usershare' returned error 255: net usershare: cannot open usershare
directory /var/lib/samba/usershares. Error No such file or directory
Please ask your system administrator to enable user sharing.
seahorse nautilus module shutdown
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*
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