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I want to grant it to a specific user A only, how to do that?

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up vote 4 down vote accepted



in /etc/sudoers. If you only want to allow sh, change the second ALL to /bin/sh.

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Is : after NOPASSWD necessary or typo? – wamp Jul 30 '10 at 3:17
It is necessary – Jason Berg Jul 30 '10 at 3:19

Put this in the sudoers:

username ALL=NOPASSWD:/bin/sh

And for the sake of teaching a man how to fish, this info is found in the man file for sudo. Just type in 'man sudo' and you'll get all the info you need.

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