Final answer:
The recommended action for system maintenance is to update system software. This is crucial for keeping the system secure and efficient. Other actions like terminating users, restarting the server, or deleting logs should be done as needed and with caution.
Step-by-step explanation:
When performing system maintenance, the recommended action would be b. update system software. This is an essential part of system upkeep as it ensures that your software is up-to-date with the latest features, security patches, and performance improvements. It is important not only for the functionality of your system but also for protecting it against vulnerabilities and threats.
Terminating logged-in users might be necessary in certain scenarios, such as when a system needs exclusive access to perform updates or changes that cannot be done while users are logged in. Similarly, restarting the server can sometimes be required to apply changes or updates that need the system to reboot. However, this is not a standard maintenance task and should be done as needed rather than routinely. Lastly, deleting system logs should be done with caution; logs are crucial for diagnosing issues and auditing purposes, so they should only be deleted in accordance with a proper log management policy and when they are no longer needed for analysis or compliance reasons.