How to Resume Interrupted Tar Extraction in Ubuntu

This guide explains how to handle interrupted tar extractions on Ubuntu systems. Since the tar utility lacks a native resume feature, this article covers the specific command-line options required to skip existing files and verify archive integrity to prevent data corruption during the process.

The tar command does not support resuming an extraction exactly where it left off like a download manager. If an extraction process is interrupted, some files may be partially written. To continue without re-extracting everything, you must use the --skip-old-files option. This tells tar to ignore files that already exist in the destination directory and only extract the missing ones.

Run the following command in your terminal:

tar --skip-old-files -xf archive.tar.gz

Replace archive.tar.gz with the name of your archive file. If you are extracting to a specific directory, add the -C flag:

tar --skip-old-files -xf archive.tar.gz -C /path/to/destination

Be aware that the file being extracted at the exact moment of interruption may be corrupted. The --skip-old-files flag will keep this partial file because it already exists. To ensure data integrity, identify the most recently modified file in the destination folder and delete it before running the command above. You can find the latest file using:

ls -lt | head -n 2

If the interruption occurred during the download of the archive itself rather than the extraction, do not attempt to extract. Instead, resume the download using wget -c or curl -O - to ensure the archive file is complete before unpacking. Always verify the checksum of the archive if available to confirm the file is not corrupted before attempting extraction again.