langnm

langnm is a command-line utility designed for renaming files. It offers a flexible and powerful way to batch rename multiple files based on a variety of patterns and transformations. The tool is particularly useful for organizing large collections of files where manual renaming would be time-consuming.

At its core, langnm allows users to define renaming rules using a combination of regular expressions and simple string replacements. This enables sophisticated operations such as adding prefixes or suffixes, changing case, numbering files sequentially, and removing or substituting specific characters within filenames. The syntax for specifying these rules is designed to be expressive yet understandable, often involving placeholder variables that represent parts of the original filename.

Users typically invoke langnm by providing the target files or a directory, followed by the renaming pattern. The utility can operate in a dry-run mode, which previews the intended changes without actually modifying any files, allowing users to verify their rules before committing to the renaming process. This safety feature is crucial for preventing accidental data loss.

The availability of langnm as an open-source project means it can be adapted and extended by the community. Its focus on efficient batch file renaming makes it a valuable tool for system administrators, developers, and anyone who frequently works with a large number of files.