# phpman > man > ZNEW(1)

> **TLDR:** Recompress files from `.Z` to gzip format.
>
- 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}}`

*Source: tldr-pages*

---

[ZNEW(1)](https://www.chedong.com/phpMan.php/man/ZNEW/1/markdown)                                General Commands Manual                               [ZNEW(1)](https://www.chedong.com/phpMan.php/man/ZNEW/1/markdown)



## NAME
       znew -   recompress .Z files to .gz files

## SYNOPSIS
       **znew** [ -ftv9PK] [ name.Z ...  ]

## DESCRIPTION
       _Znew_  recompresses  files from .Z (compress) format to .gz (gzip) format.  If you want to re‐
       compress a file already in gzip format, rename the file to force a .Z  extension  then  apply
       znew.

## OPTIONS
### -f

### -t

### -v

### -9

### -P

### -K -t

## SEE ALSO
       [gzip(1)](https://www.chedong.com/phpMan.php/man/gzip/1/markdown), [zmore(1)](https://www.chedong.com/phpMan.php/man/zmore/1/markdown), [zdiff(1)](https://www.chedong.com/phpMan.php/man/zdiff/1/markdown), [zgrep(1)](https://www.chedong.com/phpMan.php/man/zgrep/1/markdown), [zforce(1)](https://www.chedong.com/phpMan.php/man/zforce/1/markdown), [gzexe(1)](https://www.chedong.com/phpMan.php/man/gzexe/1/markdown), [compress(1)](https://www.chedong.com/phpMan.php/man/compress/1/markdown)

## BUGS
       If  the  **-P** option is used, _znew_ does not maintain the timestamp if [_touch_(1)](https://www.chedong.com/phpMan.php/man/touch/1/markdown) does not support
       the **-r** option, and does not maintain permissions if [_chmod_(1)](https://www.chedong.com/phpMan.php/man/chmod/1/markdown) does not support the **--reference**
       option.



                                                                                             [ZNEW(1)](https://www.chedong.com/phpMan.php/man/ZNEW/1/markdown)