SIMULATION -
Which file specifies the user accounts that can NOT submit jobs via at or batch? (Provide the full path and filename)
/etc/at.deny
The file that specifies the user accounts that can NOT submit jobs via at or batch in a Linux system is "/etc/at.deny".
The "at" and "batch" commands allow users to schedule jobs to run at a later time or when the system load is low, respectively. However, the system administrator may want to restrict certain users from using these commands for security or administrative reasons.
The "/etc/at.deny" file contains a list of usernames, one per line, of users who are not allowed to submit jobs using the "at" or "batch" commands. If a username is listed in this file, the user will receive an error message if they try to use either of these commands.
On the other hand, if the "/etc/at.allow" file exists, only users listed in that file will be able to use the "at" or "batch" commands. If neither file exists, only users who are members of the "at" group can use these commands.
It is important to note that the permissions of both the "/etc/at.deny" and "/etc/at.allow" files should be set to "read-only" for root only to ensure that they cannot be modified by unauthorized users.