znew - Man Page

• Recompress a file from .Z to gzip format: znew path/to/file1.Z
• Recompress multiple files and display the achieved size reduction % per file: znew -v path/to/file1.Z path/to/file2.Z ...
• Recompress a file using the slowest compression method (for optimal compression): znew -9 path/to/file1.Z
• Recompress a file, [K]eeping the .Z file if it is smaller than the gzip file: znew -K path/to/file1.Z

tldr.sh

znew [ -ftv9PK] [ name.Z ...  ]

The Znew command recompresses 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; implies -t.

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

If the -P option is used, znew does not maintain the timestamp if touch(1) does not support the -r option, and does not maintain permissions if chmod(1) does not support the --reference option.

dictd(8), gzexe(1), gzip(1), zdiff(1), zforce(1), zgrep(1), zmore(1).