Creates or records changes in an RCS file
ci [options] file-list
The ci (check in) utility creates or records changes in RCS-encoded files. It is part of RCS (Revision Control System—page 871), a group of related utilities that manages the storage, retrieval, and updating of source files. The RCS utilities covered in Part III are ci, co, rcs, and rlog.
The file-list is a list of filenames, typically working filenames. For each of the named files, ci creates or changes the corresponding RCS file in the subdirectory RCS of the working file's directory, if one exists, or in the working file's directory otherwise. See the following “Notes” for more about RCS and working filenames.
date Specifies the check-in date ...