How to enable access to the atd service for one user and deny for another in CentOS 8?

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Is it possible to restrict access to the service for specific user and allow for another?

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fpmurphy On BEST ANSWER

Yes, you can explicitly control who can create at jobs. See at.allow(5) and at.deny(5) man pages.

The /etc/at.allow and /etc/at.deny files determine which user can submit commands for later execution via at(1) or batch(1).

The format of the files is a list of usernames, one on each line. Whitespace is not permitted.

If the file /etc/at.allow exists, only usernames mentioned in it are allowed to use at.

If /etc/at.allow does not exist, /etc/at.deny is checked. every username not mentioned in it is then allowed to use at.

An empty /etc/at.deny means that every user may use at.

If neither exists, only the superuser is allowed to use at.