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Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.

Key facts

Filesystem.name
Squashfs
Filesystem.developer
Phillip Lougher, Robert Lougher
Filesystem.introduction_date
2002
Filesystem.introduction_os
Linux
Filesystem.max_file_size
16 EiB (264) bytes
Filesystem.max_volume_size
16 EiB (264) bytes
Filesystem.attributes
POSIX and extended attributes
Filesystem.compression
gzip LZMA LZO LZMA2 LZ4 Zstd
Filesystem.OS
Linux

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Wikidata facts

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inception
2002-10-23
source code repository URL
git://git.kernel.org/pub/scm/fs/squashfs
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Article

5 sections
Contents
  • Uses
  • History
  • See also
  • References
  • External links

Squashfs is a compressed read-only file system for Linux. Squashfs compresses files, inodes and directories, and supports block sizes from 4 KiB up to 1 MiB for greater compression. Several compression algorithms are supported. Squashfs is also the name of free software, licensed under the GPL, for accessing Squashfs filesystems.

Squashfs is intended for general read-only file-system use and in constrained block-device memory systems (e.g. embedded systems) where low overhead is needed.

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