On Thu, Aug 19, 2010 at 9:56 AM, mcclnx mcc <mcclnx@yahoo.com.tw> wrote:

Thank you for answer. The problem I have is "user1" need "su" privilege. If I grant "su" privilege, it can "su" to anyone. What I want is user1 can ONLY "su" to user2.

my /etc/sudoers setup:

# User privilege specification
root ALL=(ALL) ALL
user1 ALL=(root) /bin/su

any ideal to fix it?

Use complete command like this:

user1 ALL=(root) /bin/su - user2

This will limit user1 to that specific command. You can add -NOPASSWD and user1 will not have to enter their password.

John