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Chapter 6. Updating RHEL 8 content
With YUM, you can check if your system has any pending updates. You can list packages that need updating and choose to update a single package, multiple packages, or all packages at once. If any of the packages you choose to update have dependencies, these dependencies are updated as well.
6.1. Checking for updates
To identify which packages installed on your system have available updates, you can list them.
Procedure
Check the available updates for installed packages:
# yum check-update
The output returns the list of packages and their dependencies that have an update available.
6.2. Updating packages
You can use YUM to update a single package or all packages and their dependencies at once.
When applying updates to kernel, YUM always installs a new kernel regardless of whether you are using the yum update
or yum install
command. Note that this only applies to packages identified by using the installonlypkgs
YUM configuration option. Such packages include, for example, the kernel
, kernel-core
, and kernel-modules
packages.
Depending on your scenario, use one of the following options to apply updates:
To update all packages and their dependencies, enter:
# yum update
To update a single package, enter:
# yum update <package_name>
If you upgraded the GRUB boot loader packages on a BIOS or IBM Power system, reinstall GRUB. See Reinstalling GRUB.
6.3. Updating package groups
Package groups bundle multiple packages, and you can use package groups to update all packages assigned to a group in a single step.
Procedure
Update packages from a specific package group:
# yum group update <group_name>
If you upgraded the GRUB boot loader packages on a BIOS or IBM Power system, reinstall GRUB. See Reinstalling GRUB.