ZFORCE(1) BSD Reference Manual ZFORCE(1)
zforce - force gzip files to have a .gz suffix
zforce file ...
The zforce utility renames gzip(1) files to have a '.gz' suffix, so that gzip(1) will not compress them twice. This can be useful if file names were truncated during a file transfer. Files that have an existing '.gz', '-gz', '_gz', '.cgz', '.ngz', '.tgz' or '.taz' suffix, or that have not been compressed by gzip(1), are ignored.
compress(1), gzip(1)
zforce overwrites existing files without warning. MirBSD #10-current July 29, 2003 1