Security

Writing safe rules with visudo and sudoers.d.

Assessing whether a CVE actually affects your systems.

Generating keys and signing or verifying data.

IT operations folks strive to not only maximize uptime but also keep systems patched. These might seem like competing goals, but we’re here to help with Live kernel patching in Red Hat Enterprise…

Generating key pairs and choosing a good algorithm.

setuid, setgid, and the sticky bit, and why they matter.

RHEL Presents 38 on the RHEL 9 release.

Registering systems and reading advisor recommendations.

RHEL Presents 36 on LUKS disk encryption and NBDE.

Capturing terminal sessions with tlog and SSSD.

How SELinux handles ports and network access.

Applying updates with dnf and understanding what changed.