fixitytester

fixitytester is a command-line utility designed to verify the integrity of files. It operates by calculating cryptographic hash values for specified files and then comparing these computed hashes against a stored set of known-good hashes. This process is crucial for ensuring that files have not been accidentally or maliciously altered since their integrity was last confirmed.

The tool typically supports various hashing algorithms, such as MD5, SHA-1, SHA-256, and SHA-512, allowing users to choose the level of security and computational cost appropriate for their needs. Users provide fixitytester with a list of files to check and a reference file containing the expected hash values. The utility then reads each file, computes its hash, and reports any discrepancies.

fixitytester is commonly used in contexts where data preservation and authenticity are paramount. This includes archival systems, software distribution, and scientific data management. By regularly running fixitytester, organizations can detect corruption, unauthorized modifications, or transmission errors, thereby maintaining confidence in the integrity of their digital assets. The output of fixitytester can be used to identify specific files that require attention or reacquisition.