SysAdmin

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.

Zones, services, and ports in firewall-cmd.

The difference between su and sudo.

Managing connections and devices with nmcli and nmtui.

Managing services, storage, and networking from Cockpit.

Partitioning devices and creating filesystems.

Connecting and configuring the client and server sides.

Starting, stopping, enabling, and checking services with systemctl.

RHEL Presents 32 on deploying SAP on RHEL.

Installing, updating, and removing packages with dnf.

Reading ls -l output without guessing.

Creating and modifying accounts with useradd, usermod, and passwd.