RHEL Linux Red Hat System Administration 2025 – 400 Free Practice Questions to Pass the Exam

To check for software updates available for a Red Hat based system, the correct approach involves using the package manager designed for that environment. The command "yum check-update" is specifically used in Red Hat Enterprise Linux (RHEL) and its derivatives such as CentOS and Fedora to query the repositories for any available updates without actually installing them. This command communicates with the configured YUM repositories, ensuring that you are aware of any new versions of installed packages that can be upgraded.

This advantageous approach allows system administrators to maintain control over updates, as they can review what updates are available and decide when to install them, which is crucial for system stability and security. The visibility into updates via this command helps in planning maintenance windows or ensuring compliance with organizational policies on software versions.

In contrast, other commands listed do not apply to RHEL-based systems. While the "apt update" command is for Debian-based systems, such as Ubuntu, "distro-upgrade" and "update-software" are not standard commands recognized in RHEL environments. Thus, using "yum check-update" is the most appropriate method for managing software updates in RHEL.