Squashfs - Revision history

Anonymoususer852: Adjusted layout in the top area for better legibility.

2025-08-20T06:55:30Z

Adjusted layout in the top area for better legibility.

Anonymoususer852: Changed data compression to optional, and provide reference. Provide examples and references of where else SquashFS sees its deployment.

2025-08-20T06:52:34Z

Changed data compression to optional, and provide reference. Provide examples and references of where else SquashFS sees its deployment.

Anonymoususer852: /* FormatInfo template */ Added developed by and maintained by. Likely developed by Phillip Lougher, with references to the earliest possible citation.

2025-08-17T16:18:48Z

‎FormatInfo template: Added developed by and maintained by. Likely developed by Phillip Lougher, with references to the earliest possible citation.

Anonymoususer852: 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.

2025-08-16T11:18:35Z

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.

Anonymoususer852: Updated FormatInfo, added Identification section, added discmaster.textfiles.com search results to Sample files section.

2025-08-16T08:49:08Z

Updated FormatInfo, added Identification section, added discmaster.textfiles.com search results to Sample files section.

Anonymoususer852: Add Snap link.

2025-08-12T00:36:44Z

Add Snap link.

Anonymoususer852: Grammar/typo fixes.

2025-08-07T09:46:32Z

Grammar/typo fixes.

Anonymoususer852: Flesh out description and add references.

2025-08-06T22:18:48Z

Flesh out description and add references.

Anonymoususer852: Provide examples, add reference link to .sfs extension, add link to Squashfuse under Software section.

2025-07-31T20:10:30Z

Provide examples, add reference link to .sfs extension, add link to Squashfuse under Software section.

Anonymoususer852: Flesh out on description and add references.

2025-07-30T20:17:49Z

Flesh out on description and add references.

@@ Line 13: / Line 13: @@
 * Embedded devices like network routers<ref>[https://openwrt.org/docs/techref/flash.layout The OpenWrt Flash Layout - Technical Reference - openwrt.org]</ref><ref>[https://github.com/ReFirmLabs/binwalk/issues/301 problems extracting squashfs-image #301 - binwalk - GitHub]</ref><ref>[https://embeddedbits.org/reverse-engineering-my-routers-firmware-with-binwalk-embeddedbits/ Reverse engineering my router's firmware with binwalk - embeddedbits.org]</ref>, or in Android powered devices.<ref>[https://android.stackexchange.com/questions/258236/squashfs-explanation-for-android-system SquashFS explanation for Android system - Android Enthusiasts - Stack Exchange]</ref>
 * Modern AppImage,<ref>[[wikipedia:AppImage#History|History of AppImage - Wikipedia]]</ref>, or [[Snap]]<ref>[[wikipedia:Snap_(software)#Support|Snap - support section - Wikipedia]]</ref> as a way portable software distribution on Linux.
-* Storage of other data, such as disk images.<ref>[https://www.foo.be/2017/01/Squashfs_As_A_Forensic_Container Squashfs As a Forensic Container - foo.be]</ref> Under Windows, Squashfs contents can be opened/extracted via [[7-Zip]].<ref>[https://stackoverflow.com/a/36877207 python2.7 How to handle squashfs in Windows - StackOverflow]</ref>
+* Storage of other data, such as disk images.<ref>[https://www.foo.be/2017/01/Squashfs_As_A_Forensic_Container Squashfs As a Forensic Container - foo.be]</ref>
 See also [[cramfs]].

@@ Line 4: / Line 4: @@
 |extensions={{ext|sfs}}<ref>[https://github.com/plougher/squashfs-tools/issues/259 What are the commonly accepted file name extension for squashfs? #259 - GitHub]</ref>
 |wikidata={{wikidata|Q389314}}
-|compression=lossless, mandatory
+|compression=lossless, optional
 |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)
 |developed by=Phillip Lougher<ref>[https://sourceforge.net/p/squashfs/mailman/message/67563/ (Squashfs-announce) Squashfs1.2 released - 2003-03-13 05:30:45 - SourceForge mailman]</ref>
@@ Line 10: / Line 10: @@
 |released=2002
 }}
-'''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.<ref>[https://fedoraproject.org/wiki/Changes/EROFSforLiveMedia EROFS For Live Media - Fedora Project]</ref> It is also used in modern AppImage,<ref>[[wikipedia:AppImage#History|History of AppImage - Wikipedia]]</ref>, or [[Snap]]<ref>[[wikipedia:Snap_(software)#Support|Snap - support section - Wikipedia]]</ref> as a way portable software distribution on Linux. Squashfs can also be used to store other data, such as disk images.<ref>[https://www.foo.be/2017/01/Squashfs_As_A_Forensic_Container Squashfs As a Forensic Container - foo.be]</ref> Under Windows, Squashfs contents can be opened/extracted via [[7-Zip]].<ref>[https://stackoverflow.com/a/36877207 python2.7 How to handle squashfs in Windows - StackOverflow]</ref>
+'''Squashfs''' is read-only filesystem that features optional compression<ref>[https://github.com/plougher/squashfs-tools/issues/206 <nowiki>[</nowiki>feature request<nowiki>]</nowiki>: mksquashfs: Add --no-compression flag to disable all compression #206 - squashfs-tools - GitHub]</ref> 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.<ref>[https://fedoraproject.org/wiki/Changes/EROFSforLiveMedia EROFS For Live Media - Fedora Project]</ref> It is also used in:
 See also [[cramfs]].

@@ Line 6: / Line 6: @@
 |compression=lossless, mandatory
 |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
 }}

@@ Line 5: / Line 5: @@
 |wikidata={{wikidata|Q389314}}
 |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
 }}
@@ Line 13: / Line 13: @@
 == 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 ==

@@ Line 3: / Line 3: @@
 |subcat=Filesystem
 |extensions={{ext|sfs}}<ref>[https://github.com/plougher/squashfs-tools/issues/259 What are the commonly accepted file name extension for squashfs? #259 - GitHub]</ref>
 |released=2002
 }}
@@ Line 8: / Line 11: @@
 See also [[cramfs]].
 == Examples ==
@@ Line 25: / Line 31: @@
 == Sample files ==
 * {{DexvertSamples|archive/squashFS}}
 == Links ==
 * [[Wikipedia: SquashFS]]
-* [http://squashfs.sourceforge.net/ Squashfs website]
+* [https://squashfs.sourceforge.net/ Squashfs website]
 * [https://sourceforge.net/projects/squashfs/ SourceForge project page]
 * [https://github.com/plougher/squashfs-tools GitHub project page]