pack (Unix)

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File Format
Name pack (Unix)
Ontology
Extension(s) .z
Wikidata ID Q29650301

pack is a command in Unix-style operating systems to compress files using Huffman coding. Files normally have a lowercase .z extension, appended to their names including any other extension they may already have in their uncompressed versions, e.g., file.txt.z.

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See also

Identification

Files begin with bytes 0x1F 0x1E.

The gzip source code mentions an "old pack format" that begins with 0x1F 0x1F.

See also compress (Unix)#The 0x1f compression family.

Software

Sample files

References

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