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Full upgrade to the latest OS release automatically

🚀 One-linerLine to Run the Script from a URL Without Saving

Execute:

Replace <URL> with the actual raw script URL:

bash <(curl -fsSL <URL>)

✅ What This Script Does

This script checks your system and performs a full upgrade to the latest OS release automatically, including repository updates and cleanup.

🔧 Step-by-Step Breakdown:
  1. Check and install required utilities (lsb-release) if missing.
  2. Update the system package index (apt update) and report if updates are available.
  3. Upgrade current packages using apt upgrade in non-interactive mode.
  4. Display current OS information (distro name, version, codename).
  5. Check if a newer OS release is available (e.g., Debian 13, Ubuntu 24).

  6. If a newer release is available:

    • Check if it's already in /etc/apt/sources.list.
    • If not, update sources to point to the new release.
    • Run apt update again to refresh package index.
    • Perform a full system upgrade (apt full-upgrade) non-interactively.
  7. Remove old/unused packages using apt autoremove.
  8. Clean cached packages using apt autoclean and apt clean.
  9. Display final OS release information after upgrade is complete.

🛡️ The script is fully automated and handles all prompts silently — no user interaction required except for an optional reboot (not forced by the script).

Example:

bash <(curl -fsSL https://example.com/system_upgrade.sh)

Let me know if you want a reboot confirmation added at the end, or integration with cron/systemd!

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