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