RHEL 8 AppStream

RHEL 8 AppStream contains two types of content. 

1. Module
2. RPM packages

A module bundles a set of packages together. The module can contain one or more streams to have multiple versions of applications. Each stream can receive updates independently.

To list out all the available modules. Below is the list of mariadb module  

myserver#yum module list  | grep mariadb

Name                 Stream          Profiles                                 Summary

mariadb              10.3 [d][e]     client, galera, server [d]               MariaDB Module                                                                                                                  

mariadb              10.5            client, galera, server [d]               MariaDB Module        

In the above output there are two streams for mariadb 10.3 and 10.5 where 10.3 is the default as marked as "d"

To enable 10.5 stream

myserver# yum module enable mariadb:10.5/server   

To install specific version

myserver#yum module install mariadb:10.5/server

Other commands worth to try

# yum module info mariadb

# yum module list mariadb 

# yum module remove -y mariadb