What package management tools are used in the CentOS operating system?

In the CentOS operating system, the following tools are traditionally used for package management:

• yum (Yellowdog Updater, Modified) — the main package manager in CentOS 7 and earlier. It allows installing, updating, removing packages, and managing repositories.

• dnf — a more modern package manager that replaced yum in CentOS 8 and later. It provides improved performance and dependency management.

• rpm — a low-level tool for installing, removing, and managing RPM packages. It is used under the hood by yum/dnf.

Example of installing a package using yum:

yum install httpd

Or using dnf:

dnf install httpd

Thus, for CentOS 7 and below — yum, for CentOS 8 and above — dnf, and rpm for low-level operations.