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I'm attempting to configure the following things via an ACL on CentOS 6:

  1. Allow UserX to mount any directory without sudo
  2. Allow UserX ability to edit /etc/fstab without sudo

Having never configured an ACL before, I'm not sure where to start.

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Delegating mount in this way is best handled through sudo, as ACLs are inappropriate (read: I cannot for the life of me think of a way to do it via ACLs).

If the only file they need to edit is fstab, you'd probably be better off changing the group ownership to a custom group, and giving UserX secondary group membership of that group.

Upshot: IMHO, nothing that can be done without ACLs should be done with them; they complicate life. In this case, both tasks are better done without them.

Edit: try passwordless sudo for the user who needs to mount/unmount. A sudoers entry like

userx    ALL=(root) NOPASSWD: /bin/mount

may well do what you need it to, though you'd better hope that userx doesn't feel like experimenting or messing around!

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Sorry I'm very new to Linux systems administration (I usually just develop on it!). Changing the permissions of the file is a perfect solution for the fstab issue. However doing a sudo requires a user to input the password and this isn't suitable. I need to be able to mount/unmount a share at the command line without a sudo. – user130810 Aug 7 '12 at 11:52

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