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tldr/pages/common/zpaq.md

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# zpaq
> Incremental journaling backup utility and archiver.
> More information: <https://mattmahoney.net/dc/zpaq.html>.
- [a]dd a file or directory to a new or existing archive:
`zpaq a {{path/to/archive.zpaq}} {{path/to/file_or_directory}}`
- Create or add to an encrypted archive:
`zpaq a -k{{password}} {{path/to/archive.zpaq}} {{path/to/file_or_directory}}`
- E[x]tract the most recent versions of files:
`zpaq x {{path/to/archive.zpaq}}`
- [l]ist the archive contents:
`zpaq l {{path/to/archive.zpaq}}`
- Set the level of compression (higher means more compression but slower):
`zpaq a {{path/to/archive.zpaq}} -m{{1|2|3|4|5}} {{path/to/file_or_directory}}`
- E[x]tract the specified files from the archive that are not newer than the specified date:
`zpaq x {{path/to/archive.zpaq}} {{path/in/archive/to/extract}} -to {{path/to/output}} -until {{YYYY-MM-DD}}`