recompress .Z files to .gz files
Recompress a file from .Z to .gz format
Recompress multiple files and display the achieved size reduction % per file
Recompress a file using the slowest compression method (for optimal compression)
Recompress a file, [K]eeping the .Z file if it is smaller than the .gz file
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.
Force recompression from .Z to .gz format even if a .gz file already exists.
Tests the new files before deleting originals.
Verbose. Display the name and percentage reduction for each file compressed.
Use the slowest compression method (optimal compression).
Use pipes for the conversion to reduce disk space usage.
Keep a .Z file when it is smaller than the .gz file; implies -t.
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.