Linux Update Dashboard is a self-hosted web app that lets you check and apply package updates across a whole fleet of Linux servers from one browser dashboard, over SSH, with no agent installed on any managed machine. It discovers each server's package managers, operating system, installed packages, reboot state, and distribution lifecycle, then lets you refresh, upgrade selected packages, run full upgrades, autoremove leftovers, cancel running work, or reboot remotely while watching real-time command output stream into the page. Groups with health badges and explicit priorities organize fleets for clear overviews and ordered Upgrade All batches that run as waves across eligible systems. An encrypted SSH credential vault stores reusable passwords, private keys, and OpenSSH certificates with AES-256-GCM, and you can view or edit repository source files through sudoedit with diff review and activity history. Cron-based schedules automate refreshes, updates, autoremove, reboots, and notifications for chosen systems, while alerts go out by email, Gotify, MQTT, ntfy.sh, Telegram, or webhooks, with Home Assistant MQTT discovery entities for every server. Sign-in supports passwords with optional TOTP, passkeys and WebAuthn, OpenID Connect SSO, and API tokens, and the interface speaks ten languages with dark and light themes and custom branding. Because this tool can run commands on your servers, keep it on trusted networks behind TLS, a reverse proxy, or a VPN. 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.