From Red Hat to CentOS to Rocky and AlmaLinux
How Red Hat Linux split into Fedora and RHEL, why CentOS existed, what the 2020 CentOS Stream change broke, and where Rocky Linux and AlmaLinux came from.
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Rocky Linux vs AlmaLinux: which for a VPS?
Rocky Linux and AlmaLinux rebuild the same Red Hat sources. What differs is the compatibility promise, and whether older CPUs are still supported.
Install Docker on Rocky Linux or AlmaLinux
Install Docker Engine on Rocky Linux or AlmaLinux with dnf, then fix what Ubuntu guides skip: podman owning the docker command and SELinux on bind mounts.
firewalld basics for a Rocky or AlmaLinux VPS
Open SSH, allow a web port, close one, and survive a reboot with firewalld on Rocky or AlmaLinux. Zones explained, plus the --permanent trap.
SELinux basics for a server: what it breaks
nginx returns 403 and the permissions look fine. Read the SELinux denial, fix the label with semanage and restorecon, and leave enforcing on.
dnf-automatic security updates on Rocky/Alma
Configure dnf-automatic on Rocky Linux and AlmaLinux: security-only mode, the systemd timer, email alerts, and a reboot policy that avoids surprises.