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19.2. At and Batch

While Cron is used to schedule recurring tasks, the At utility is used to schedule a one-time task at a specific time and the Batch utility is used to schedule a one-time task to be executed when the system load average drops below 0.8.

19.2.1. Installing At and Batch

To determine if the at package is already installed on your system, issue the following command:
rpm -q at
The command returns the full name of the at package if already installed or notifies you that the package is not available.
To install the packages, use the dnf command in the following form as root:
dnf install package
For example, to install both At and Batch, type the following at a shell prompt:
~]# dnf install at
For more information on how to install new packages in Fedora, see Section 6.2.4, “Installing Packages”.