Utilizing File Hashes in Renaming

F2 provides the functionality to incorporate file hashes directly into the new filename during the renaming process.

This can be especially useful for generating unique, fingerprint-based names for files, which can help prevent conflicts or ensure that file names are based on their actual content.

To include a file hash in the replacement string, use the pattern {hash.<function>}, where <function> represents the desired hash algorithm. Supported hash functions include:

• md5: Produces a 128-bit hash, commonly used for checksums.
• sha1: Generates a 160-bit hash.
• sha256: Produces a more secure 256-bit hash.
• sha512: Generates a 512-bit hash, offering the highest level of uniqueness and security among these options.
• xxh32 and xxh64: Uses the xxhash algorithm.

Example

Below is an example that illustrates how you can rename files using their MD5 hash as the new filename:

f2 -f '^(1|2)\.mkv' -r '{hash.md5}{ext}'

In this command:

• -f '^(1|2)\.mkv' selects files named 1.mkv or 2.mkv.
• -r '{hash.md5}{ext}' replaces the filename with its MD5 hash, while keeping the original file extension (.mkv).

After executing the command, you will see a summary of the changes:

┌──────────────────────────────────────────────────────────┐
| ORIGINAL | RENAMED                              | STATUS |
| ******************************************************** |
| 1.mkv    | d41d8cd98f00b204e9800998ecf8427e.mkv | ok     |
| 2.mkv    | ddd5752b5fe66fd98fb9dcdee48b4473.mkv | ok     |
└──────────────────────────────────────────────────────────┘