The filebrowser example comes with an RCS repository. This tutorial relies on RCS 5.7 which is supplied together with the SNiFF+ package and is installed from there. To check whether the correct version of RCS is in your path:
Open a Unix shell.
Enter
% rcs -V1
at the command prompt.
You will receive one of the following outputs:
rcs error: -V1 out of range 3..5
This shows that the correctversion of RCS is installed.
rcs error: Unknown option: -V1
This shows that an old, unusable version of RCS is installed. If you get this output,
please install RCS 5.7 to execute the version control steps in the next chapter.