Recommended Resources

Find the right resource for the task you are working on.

Versions / Lifecycle

• Red Hat Product Life Cycles — Support timelines for each RHEL release
• AlmaLinux Errata — AlmaLinux security advisories and updates
• Rocky Linux Errata — Rocky Linux security advisories
• EL Version Timeline — Our version and lifecycle comparison

Packages / Repositories

• pkgseek — Cross-distro package search (the data source behind our version comparison and Install Doctor): version compare, file reverse-lookup, CVE data, and migration mapping. Also offers a read-only MCP endpoint (no key required) and a pkgseek-linux Skill for AI assistants like Claude Code — see pkgseek.com/skills/install
• pkgs.org — Find which repository ships an RPM package
• EPEL Project — EPEL repository usage guide
• RPM Fusion — Multimedia and non-free software repository
• Remi Repository — Newer versions of PHP and other software

SELinux

• SELinux Project Wiki — Official SELinux documentation
• Red Hat SELinux Guide — The most comprehensive SELinux usage guide
• man semanage-fcontext / man setsebool — Local man pages are often the most useful reference

Networking / Firewall

• firewalld Documentation — Official firewalld docs
• NetworkManager Documentation — NetworkManager developer docs
• nmcli Examples — Practical nmcli examples

systemd / Services

• systemd Official Documentation — Specification reference
• systemd.unit(5) — Unit file format
• systemd by Example — Interactive systemd tutorial

Containers

• Podman Documentation — Official Podman docs
• Docker Documentation — Official Docker docs
• Red Hat Container Catalog — Official container images

Virtualization

• libvirt Documentation — KVM/QEMU management API
• Red Hat Virtualization Guide

Official Documentation

• Red Hat Enterprise Linux Documentation — The most authoritative EL documentation, applicable to all EL distributions
• AlmaLinux Wiki — Official AlmaLinux Wiki
• Rocky Linux Documentation — Official Rocky Linux documentation
• CentOS Stream Documentation — CentOS project documentation
• Fedora Documentation — Fedora is the upstream of RHEL; much of its content applies to EL

China Distributions

• OpenAnolis Community — Anolis OS community site
• OpenCloudOS — OpenCloudOS official site
• Oracle Linux Documentation

Community

• Server World — Hands-on tutorials (English), covering multiple EL versions

Learning Tips

1. Prioritize official Red Hat documentation — It is the most comprehensive and accurate, and directly applicable to AlmaLinux and Rocky Linux
2. Make good use of the man command — EL systems have high-quality man pages
3. Practice hands-on — Setting up virtual machines and practicing repeatedly is the most effective way to learn
4. Check logs first when troubleshooting — journalctl is your best friend