Originally posted by: SystemAdmin
Ensure that any lines like:
<login> ALL = (ALL) ALL
have been commented out, and that there are not entries for /usr/bin/su unless these are similar to:
<login> ALL = /usr/bin/su - <admin>
where <admin> is an administrative login, not root. Be careful that there are no directories in the allowed commands; as, if there is an editor in the directory, then the user can usually gain root access from it.
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