Red Hat SummitChapter 5. Updating RHEL content
To maintain the security and performance of your Red Hat Enterprise Linux (RHEL) 10 system, apply software updates by using the DNF tool. Regularly installing package and security updates ensures your environment remains stable, up-to-date, and protected against known vulnerabilities.
With the DNF tool, you can list packages that need updating and choose to update a single package, multiple packages, or all packages at once.
You can manage software updates in the Red Hat Enterprise Linux web console, which provides a graphical interface for DNF.
5.1. Checking for updates
To ensure your Red Hat Enterprise Linux (RHEL) 10 system remains secure and efficient, check for available software updates by using the DNF tool. By identifying pending updates, you can plan maintenance windows and prioritize security fixes before applying changes to your environment.
Procedure
Check the available updates for installed packages:
# dnf check-updateThe output returns the list of packages and their dependencies that have an update available.
5.2. Updating packages
To maintain the security and stability of your Red Hat Enterprise Linux (RHEL) 10 system, install the latest software updates by using the DNF tool. Regularly applying package updates ensures your environment has essential security patches and bug fixes.
You can use DNF to update a single package, a package group, or all packages and their dependencies at once. If any of the packages you want to update have dependencies, DNF updates these dependencies as well.
When applying updates to the kernel, dnf always installs a new kernel regardless of whether you are using the dnf upgrade or dnf install command. Note that this only applies to packages identified by using the installonlypkgs DNF configuration option. Such packages include the kernel, kernel-core, and kernel-modules packages.
If you upgraded the GRUB boot loader packages on a BIOS or IBM Power system, reinstall GRUB. See Reinstalling GRUB.
Procedure
Depending on your scenario, use one of the following options to apply updates:
To update all packages and their dependencies, enter:
# dnf upgradeTo update a single package, enter:
# dnf upgrade <package_name>To update packages only from a specific package group, enter:
# dnf group upgrade <group_name>
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