Usage: rename [options] files... expression

rename is a utility for renaming multiple files, rename takes the list of files to rename and a search/replace pattern as the last argument.

If no filenames are given, filenames will be read from stdin.

It's similar to Unix rename and Perl Rename written in Go.

Backup files, add ".bak" to all files: rename path/to/files/* 's/$/.bak//'

Backup files, add ".bak" to all files (keeping the original): rename path/to/files/* 's/$/.bak//' -c

Remove (last) extension: rename path/to/files/* 's/\.[a-z]+$//'

Swap double extensions : rename path/to/files/* 's/([a-z]+)\.([a-z]+)$/$2.$1/'

brew install fbergen/tap/rename

-c, --copy=false: Copy instead of move.
-f, --force=false: Overwrite existing files.
-h, --help=false: Show help dialog.
-i, --interactive=false: Ask for confirmation, before renaming
-n, --no-action=false: Don't perform any changes. Show what files would have been renamed.
-v, --verbose=false: Show which files where renamed, if any.