Chapter 1. Software management tools in Red Hat Enterprise Linux 9
In Red Hat Enterprise Linux (RHEL) 9, use the DNF utility to manage software. For compatibility reasons with previous major RHEL versions, you can still use the yum command. However, in RHEL 9, yum is an alias for dnf which provides a certain level of compatibility with yum.
Note
Although RHEL 8 and RHEL 9 are based on DNF, they are compatible with YUM used in RHEL 7.