Squashfs
(Updated FormatInfo, added Identification section, added discmaster.textfiles.com search results to Sample files section.) |
(Added link for magic bytes, only for FormatInfo. Added magic bytes for both little-endian and big-endian, depending on source machine. Fixed typo where magic was missing one byte at the end for little-endian.) |
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|wikidata={{wikidata|Q389314}} | |wikidata={{wikidata|Q389314}} | ||
|compression=lossless, mandatory | |compression=lossless, mandatory | ||
| − | |magic=68 73 71 | + | |magic=[https://github.com/file/file/blob/master/magic/Magdir/filesystems#L2194 68 73 71 73] (little-endian)<br />[https://github.com/file/file/blob/master/magic/Magdir/filesystems#L2191 73 71 73 68] (big-endian) |
|released=2002 | |released=2002 | ||
}} | }} | ||
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== Identification == | == Identification == | ||
| − | SquashFS files begins with hexadecimal {{magic|68 73 71}}, which translates to "hsqs" in ASCII. | + | SquashFS files created on little-endian machines begins with hexadecimal {{magic|68 73 71 73}}, which translates to "hsqs" in ASCII. SquashFS files created on big-endian machines with hexadecimal {{magic|73 71 73 68}}, which translates to "sqsh" in ASCII. |
== Examples == | == Examples == | ||
Revision as of 11:18, 16 August 2025
Squashfs is a compressed read-only filesystem for Linux. Typically used as a "live image" for booting Linux off a removable storage (e.g. USB, CD/DVD), minus components like the bootloader, kernel and initramfs.[2] It is also used in modern AppImage,[3], or Snap[4] as a way portable software distribution on Linux. Squashfs can also be used to store other data, such as disk images.[5] Under Windows, Squashfs contents can be opened/extracted via 7-Zip.[6]
See also cramfs.
Contents |
Identification
SquashFS files created on little-endian machines begins with hexadecimal 68 73 71 73, which translates to "hsqs" in ASCII. SquashFS files created on big-endian machines with hexadecimal 73 71 73 68, which translates to "sqsh" in ASCII.
Examples
Create a Squashfs (file system) image from current/present directory and output it into its parent directory:
$ mksquashfs . ../example.squashfs -b 1048576 -comp xz -Xdict-size 100%
Open a Squashfs image (as root) from present directory and have its contents visible in /mnt:
# mount example.squashfs /mnt
Open a Squashfs image (as user) from present directory and have its contents visible in /mnt/temp:
$ squashfuse example.squashfs /mnt/temp
Software
- 7-Zip
- Squashfuse (Unix-like only)
Sample files
- dexvert samples — archive/squashFS
- Search results for .sfs extension and is squashFS format - Discmaster.textfiles.com
