Build 571 contains a completely re-written version of ‘und’, the command line interface for Understand.
The commands have been standardized and the tool should be much easier to use. Because of the extensive changes, this new version is not backwards compatible with older versions of und. The old und will still ship and has been renamed ‘undlegacy’ – current users will need to change the name of the binary for scripts to continue to work.
In general the syntax for running commands are similar to Subversion and should be much more intuitive than previous versions.
The new version also includes a cool new interactive mode that lets you specify a database and then continually run commands in it, similar to MySQL.
The help documentation has been flushed out extensively and should be much more useful – just run und help for a complete overview of how to use this great new tool.