debian extract恢复步骤

Here are the common methods to recover data in Debian using extract-related tools:

1. extundelete (for ext3/ext4 filesystems)

   • Install: sudo apt-get update && sudo apt-get install extundelete
   • Stop services: Stop all services accessing the target partition to prevent data overwriting.
   • Unmount partition: sudo umount /dev/sdXY (replace with your actual partition, e.g., /dev/sda1).
   • Recover specific file: sudo extundelete /dev/sdXY --restore-file path/to/deleted/file
   • Recover directory: sudo extundelete /dev/sdXY --restore-directory path/to/deleted/directory
   • Preview (optional): Use --dry-run to check recovery results before actual operation.

2. testdisk (supports multiple filesystems)

   • Install: sudo apt-get update && sudo apt-get install testdisk
   • Run: sudo testdisk
   • Select disk: Choose the affected disk from the list.
   • Analyze: Select “Analyse” → “Quick Search” (or “Deep Search” for more thorough results).
   • List files: Navigate to the found partition and select “List” to view deleted files.
   • Recover: Use “Undelete” to restore selected files to a safe location (different from the original partition).

3. photorec (companion to testdisk, for various file types)

   • Install: sudo apt-get update && sudo apt-get install photorec
   • Run: sudo photorec /dev/sdXY (specify the target partition).
   • Follow wizard:
     • Choose “Proceed” and select the partition type.
     • Set file system type (e.g., ext4) and analysis scope (entire partition or free space only).
     • Select a destination directory (on a different partition) to save recovered files.
   • Wait: Recovery may take time; avoid using the disk during this process.

4. foremost (file carving tool)

   • Install: sudo apt install foremost
   • Run: sudo foremost -t all -i /dev/sdXY -o /tmp/recovered_files (replace with your partition and desired output directory).
   • Check results: Recovered files are categorized by type in subdirectories under the output directory.

Key notes for all methods:

• Stop using the affected partition immediately after data loss to minimize overwriting.
• Recover files to a different partition or external storage to avoid further data loss.
• Recovery success depends on factors like time since deletion, disk usage, and whether the data was overwritten.

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