On 11/14/06, Aaron S. Joyner <[EMAIL PROTECTED]> wrote:
Philip and Jason's understanding is correct, Tanner's assertion that su
is changing to UID 0 by default is incorrect. The obvious reasons being
two fold, first off su uses PAM, and the PAM module pam_unix requires a
username to know which password to validate against. More simply
though, even if you didn't use pam, it's still got to know which entry
in /etc/{passwd,shadow} to look at, as there can be more than one UID 0
(also as previously discussed).
Yeah, I realized later that what I meant to say was not that su - changes
to the uid 0 but rather sudo changes to user id 0. Sudo uses the password
of the user invoking the sudo command, and then changes to uid 0, which
is the account with "root" privileges.
Cheers,
Tanner
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Tanner Lovelace
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http://wtl.wayfarer.org/
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