Pack (Unix)
From Just Solve the File Format Problem
pack is a command in Unix-style operating systems to compress files using Huffman coding. Files normally have a .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
- compress: A compressed file format with a similar filename extension
Identification
Files begin with bytes 0x1F 0x1E.
The gzip source code mentions an "old pack format" that begins with 0x1F 0x1F.
Software
- GNU gzip can uncompress pack files.
