For new BitKeeper users it's important to note that after files are checked in, they no longer appear in your directory. The process of checking in files removes the files from the directory and places them in SCCS sub-directories. Once in the SCCS sub-directory, the file can be retrieved with the bk get or bk edit commands. Most versions of the Unix make command know about the SCCS sub-directory and will automatically check out files as they are needed.