Created Debian Upgrade (markdown)

restitux/Debian Upgrade.md

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+# NOTE
+Please refer to the official debian documentation for upgrading to the release in question. This page only serves and quick notes on the process.
+
+# Update Apt Sources
+First, update your apt sources list to point to the new debian version.
+1. Open `/etc/apt/sources.list` and any files in `/etc/apt/sources.list.d`
+2. `s/CURRENT_VERISON/NEW_VERSION/`
+3. Run `apt update`
+
+# Verify free disk space
+Required disk space for the update can be printed by running `apt -o APT::Get::Trivial-Only=true full-upgrade`.
+
+# Run the update
+1. Install updates for currently installed packages: `apt upgrade --without-new-pkgs`
+2. Install all updates: `apt full-upgrade`
+3. Reboot: `reboot`
+4. Remove obsolete packages: `apt purge '?obsolete'`
+5. Remove unnecessary packages: `apt autoremove`