Table 3. Controlling User Access to at
/etc/at.allow /etc/at.deny Resulting Policy
------------------------------------------------------------------------------------------------
Does not exist Does not exist Only the root user has permission.
------------------------------------------------------------------------------------------------
Exists ---- Only the users listed in /etc/at.allow
have permission.
------------------------------------------------------------------------------------------------
Does not exist Exists All users have permission except those
listed in /etc/at.deny. This is
typically the default configuration
when Linux is installed.
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