|| FreeBSD General Commands Manual
convert compressed files to gzipped files
utility uncompresses files compressed by
and recompresses them with
The options are as follows:
Overwrite existing ‘.gz’ files. Unless this option is specified,
znew refuses to overwrite existing files.
Test integrity of the gzipped file before deleting the original file. If the integrity check fails, the original ‘.Z’ file is not removed.
Print a report specifying the achieved compression ratios.
Use the -9 mode of
gzip(1), achieving better compression at the cost of slower execution.
Keep the original ‘.Z’ file if it uses less disk blocks than the gzipped one. A disk block is 1024 bytes.
znew utility tries to maintain the file mode of the original file. If the original file is not writable, it is not able to do that and
znew will print a warning.