Can Unrar Automatically Rename Duplicate Files?

The command-line tool unrar can automatically rename extracted files that have conflicting names with existing files in the target directory. By using the built-in -or switch, users can prevent accidental overwrites and bypass manual interactive prompts, allowing the utility to automatically append an incremental number to the conflicting filename.

How to Automatically Rename Files Using Unrar

To automatically rename files during extraction when a file with the same name already exists in the destination, use the -or (auto-rename) switch.

The command syntax is:

unrar x -or archive.rar

Or for flat extraction without subdirectories:

unrar e -or archive.rar

How the -or Switch Works

When the -or flag is passed:

• Detection: The tool checks the destination directory before extracting each item.
• Renaming Scheme: If document.txt already exists, the newly extracted file will automatically be saved as document(1).txt. If document(1).txt also exists, it proceeds to document(2).txt, and so on.
• Non-Interactive Execution: The extraction runs smoothly without pausing to ask the user whether to overwrite, skip, or rename the conflicting file, making it ideal for automated bash scripts and background jobs.

Alternative Overwrite Controls

To handle file conflicts differently, unrar provides alternative flags:

• -o+: Overwrites all existing files without prompting.
• -o-: Skips all files that already exist in the destination without prompting.
• Default (no switch): Pauses and prompts the user interactively with options to overwrite, skip, rename, or cancel whenever a collision occurs.