Dnf

For Yum, Apt, and Repos stuff, refer to the Yum, Apt, and Repos page.

Dnf

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DNF is the modern successor to Yum, featuring improved speed, efficiency, and enhanced dependency resolution capabilities.

More information: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_basic_system_settings/managing-software-packages_configuring-basic-system-settings#doc-wrapper

How to Lock a Specific Package

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If you want to lock a package, such as the kernel so that you can prevent other kernels from getting installed, you can edit the following file and list the packages you want to lock:

$ dzdo cat /etc/dnf/dnf.conf | grep -i exclude
exclude=kernel* kmod-kvdo