This is a simple-to-use command-line gem to rename batch of files (or folders) using regex patterns. Sequential numbering feature is also added to re-define (or establish) numbered files. Supported regex follows PCRE convention which is very similar to the one used by VSCode. At this stage, this program is designed to rename files located at root folder. Therefore, you would need first to change directory to the location of the files to use mvb. For full documentation, use "mvb -h".