Man page 1 : znew

znew - recompress .Z files to .gz files

znew [ -ftv9PK] [ name.Z ... ]

Znewrecompresses files from .Z (compress) format to .gz (gzip) format. If you want to recompress a file already in gzip format, rename the file to force a .Z extension then apply znew.

-f

    Force recompression from .Z to .gz format even if a .gz file already exists.

-t

    Tests the new files before deleting originals.

-v

    Verbose. Display the name and percentage reduction for each file compressed.

-9

    Use the slowest compression method (optimal compression).

-P

    Use pipes for the conversion to reduce disk space usage.

-K

    Keep a .Z file when it is smaller than the .gz file

gzip(1), zmore(1), zdiff(1), zgrep(1), zforce(1), gzexe(1), compress(1)

Znewdoes not maintain the time stamp with the -P option if cpmod(1)is not available and touch(1)does not support the -r option.