CLEAN Command This command is used to "clean-up" your directory. It will Delete all but the highest numbered version of a file (e.g. if there are two versions of one file WING.SCT;1 and WING.SCT;2 then WING.SCT;1 will be deleted from the directory). TRUNCATE all files (remove unused allocated blocks and return them to the file management system). TOTAL the number of files and allocated disk blocks and print these numbers on your terminal. The clean command will not affect those files which have been secured or protected from being deleted. Such files, if of a lower version number than a file of identical name, will cause CLEAN to print an before error message and continue on to the next file in your directory.