Centos Linux Triage

This handles CentOS troubleshooting with a structured approach that covers the RHEL ecosystem's quirks. It walks through systemctl service checks, journalctl log analysis, and package management with dnf or yum depending on your version. The workflow includes SELinux context verification and firewalld rule validation, which are often overlooked causes of mysterious failures on CentOS systems. Each remediation step comes with validation commands to confirm fixes actually worked, plus rollback procedures when things go sideways. Most useful when you're dealing with service startup failures, networking issues, or permission problems on production CentOS boxes.