SysAdmin

Querying installed packages and what owns a file with rpm -q.

Sessions, windows, and panes to organize your work.

Creating and managing VMs with virsh and virt-manager.

Aliases and functions for the commands you run constantly.

Querying the systemd journal with journalctl.

Enabling EPEL and other trusted repositories.

Capturing terminal sessions with tlog and SSSD.

Conditionals with if/test and comparison operators.

Structure of a script: shebang, variables, and arguments.

Command history, tab completion, and keyboard shortcuts.

Reading man pages and navigating them efficiently.

SELinux on RHEL without the fear: enforcing vs permissive vs disabled, how contexts and booleans work, and how to read a denial and fix it the right way.