Unpatched Linux servers expose production environments to critical vulnerabilities, and PatchMon eliminates that blind spot by centralizing package telemetry, security advisory tracking, and automated update orchestration across your entire fleet. Administrators can inspect pending updates across APT, DNF, YUM, APK, Pacman, Zypper, FreeBSD pkg, Windows Update, and winget from one unified queue without opening inbound firewall ports on monitored hosts. Before touching production workloads, operators run dry-run validations to preview exact package transactions, enforce multi-user approval workflows, and schedule rollouts during fixed maintenance windows. During execution, live agent output streams directly to the browser over WebSocket so engineers can watch progress in real time or halt a problematic upgrade mid-flight. Beyond package updates, the platform runs OpenSCAP CIS benchmark and Docker Bench security assessments, inventories running containers and outdated base images, and routes host-down or threshold alerts to Slack, Discord, Microsoft Teams, ntfy, or email. Built-in browser SSH and Apache Guacamole RDP terminals let teams troubleshoot machines directly through the outbound agent tunnel with role-based access control and OIDC single sign-on. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.