In this lab we are going to make sure we have the minimum knowledge we need in order to successfully pass the RHCE on RHEL8. In this lab we’ll cover `yum/dnf` and the new Application Stream module. Since this is a new tool with RHEL8 it’s normal to not understand it 100%, but this lab will help reinforce how to use the Application Stream.
Learning Objectives
Successfully complete this lab by achieving the following learning objectives:
- Install PostgreSQL Version 9.6
If you run
yum module listyou’ll note thatpostgresql 10has a [e] next to it, indicating it’s installed.Since our task is to install
postgresql 9.6we need to fix that. Note thatyumanddnfare interchangeable commands:dnf remove postgresql dnf module reset postgresql dnf module enable postgresql:9.6 dnf install postgresqlThose commands will remove the installed
postgresql-10, reset the application stream, set the correct version for the application stream, and then install the correct version of postgresql.- Install httpd
While Apache does have an Application Stream, there aren’t multiple versions. On top of that, our task doesn’t specify a version anyway.
So it’s easy to just
yum -y install httpdand call it done.
