File f = new File(path);
String old_path = "";
if (!f.exists()) {
    int index = path.lastIndexOf("CS.cfg");
    if (index != -1) {
        old_path = path.substring(0, index) + "CMS.cfg";
    }
    File f1 = new File(old_path);
    if (f1.exists()) {
        // The following block of code moves "CMS.cfg" to "CS.cfg".
        try {
            if (Utils.isNT()) {
                // NT is very picky on the path
                Utils.exec("copy " +
                    f1.getAbsolutePath().replace('/', '\\') +
                    " " +
                    f.getAbsolutePath().replace('/', '\\'));
            } else {
                // Create a copy of the original file which
                // preserves the original file permissions.
                Utils.exec("cp -p " + f1.getAbsolutePath() + " " +
                    f.getAbsolutePath());
            }

            // Remove the original file if and only if
            // the backup copy was successful.
            if (f.exists()) {
                if (!f1.delete()) {
                    CMS.debug("CMSStartServlet: init: Cannot delete file : " + old_path);
                }

                // Make certain that the new file has
                // the correct permissions.
                if (!Utils.isNT()) {
                    Utils.exec("chmod 00660 " + f.getAbsolutePath());
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}