XZ Utils

XZ Utils is free general-purpose data compression software with high compression ratio. XZ Utils were written for POSIX-like systems, but also work on some not-so-POSIX systems. XZ Utils are the successor to LZMA Utils.

Features

High compression ratio
Fast decompression
Small memory requirements for decompression
Multi-threading support for compression
Integrity checking (CRC32, CRC64, SHA-256)
Easy-to-use command line interface
API for integration with applications

Main Components

xz - The primary compression/decompression tool
unxz - Decompression tool (symlink to xz)
xzcat - Decompresses to standard output (symlink to xz)
lzma - Compatibility tool for LZMA format (symlink to xz)
unlzma - Decompression tool for LZMA format (symlink to xz)
lzcat - Decompresses LZMA to standard output (symlink to xz)
xzdec - Small decompressor for embedded use
lzmadec - Small LZMA decompressor for embedded use
lzmainfo - Shows information stored in LZMA files
liblzma - Compression library with C API

Usage Examples

Basic Compression

# Compress a file
xz file.txt

# Compress with maximum compression
xz -9 file.txt

# Compress keeping the original file
xz -k file.txt

Basic Decompression

# Decompress a file
unxz file.txt.xz

# Decompress to standard output
xzcat file.txt.xz

Advanced Options

# Compress with custom dictionary size
xz --dict-size=64MiB file.txt

# Compress with multiple threads
xz -T4 file.txt

# Test integrity of compressed file
xz -t file.txt.xz

Library Integration

The liblzma library provides a C API for applications to integrate XZ compression capabilities. Header files are installed in ${PREFIX}/include/lzma/ and the library can be linked with -llzma.

Licenses

XZ Utils is distributed under multiple libre licenses:

BSD Zero Clause License (0BSD)
GNU Lesser General Public License v2.1 (LGPLv2.1)
GNU General Public License v2 (GPLv2)
GNU General Public License v3 (GPLv3)

You can choose to use the software under any of these licenses.

Documentation

Comprehensive man pages are available for all commands and the library API. Additional documentation and examples can be found in ${PREFIX}/share/doc/xz/.

More Information

For more details, visit the official website: https://tukaani.org/xz/

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