au
au is a lightweight command-line utility designed for Termux users to automatically backup installation files for .deb packages. The tool simplifies system maintenance by enabling easy rollback to previous package versions in case an update causes system instability or conflicts. When executed, au performs a standard update and upgrade sequence for Termux packages while simultaneously archiving the former package versions to a designated storage location, typically within the Android data directory or an optional external microSD card for space optimization. This creates a reliable safety net allowing users to quickly downgrade problematic packages using standard dpkg commands to restore system stability. Users install the script into their system path to access it as a one-command solution for both updating and securing their package history. By integrating the backup process directly into the routine update workflow, au ensures that historical package versions are preserved without requiring manual interven