Install dosfstools with Homebrew, apk, apt, dnf, MacPorts, Nix, pacman, zypper

Project links

• Homepage
• Repository
• Upstream docs
• Package manager page

Commands and aliases

• dosfsck
• dosfslabel
• fatlabel
• fsck.fat
• fsck.msdos
• fsck.vfat
• mkdosfs
• mkfs.fat
• mkfs.msdos
• mkfs.vfat

Project history

The official source tree records mkfs.fat lineage beginning with Linus Torvalds in 1991 and fsck.fat lineage beginning with Werner Almesberger in 1993. Later copyright history in the source credits work by Remy Card, David Hudson, H. Peter Anvin, Roman Hodek, Daniel Baumann, Andreas Bombe, and Pali Rohár.

Roman Hodek's 1998 work added or fixed major FAT features such as Atari format support, larger filesystems, and FAT32 support. The modern project now presents itself as a GPLv3-or-later suite consisting of mkfs.fat, fsck.fat, and fatlabel.

The NEWS file shows a portability turn in version 4.0 in 2016: Linux-specific assumptions were reduced, the build moved to autotools, and the tools were tested on FreeBSD and OS X. Version 4.1 added a test suite in 2017, and version 4.2 in 2021 expanded fatlabel behavior, FAT label compatibility, repair prompts, Year 2038 fixes, and many fsck/mkfs correctness details.

Adoption history

dosfstools became infrastructure because FAT filesystems remained common on USB drives, SD cards, firmware update media, cameras, and Windows-compatible exchange volumes. Source facts list packaging across apk, Homebrew, Debian, Fedora, MacPorts, Nix, pacman, Ubuntu, and zypper.

Compatibility symlinks keep older command names such as dosfsck, fsck.msdos, fsck.vfat, mkdosfs, mkfs.msdos, mkfs.vfat, and dosfslabel available for distributions and scripts that predate the current mkfs.fat/fsck.fat/fatlabel naming.

How it is used

The commands create FAT filesystems, check and repair FAT filesystems, and read or write labels and volume IDs. They are normally used by administrators, installers, image-building scripts, and packaging workflows that need FAT-formatted media or disk images.

Release notes emphasize edge-case correctness: volume label compatibility with MS-DOS and Windows variants, FAT12/FAT16/FAT32 cluster handling, sparse-file test images, CHS geometry for SD cards, MBR helper behavior, and repair behavior for corrupt FAT tables.

Why package nerds care

dosfstools is package-nerd significant because it is boring in exactly the valuable way: a tiny suite of root-adjacent utilities that must encode filesystem folklore from DOS, Windows, Linux, SD cards, Atari variants, and old command names.

The 2016 portability work is especially relevant for Homebrew and MacPorts: it turned a historically Linux-centered tool into something more natural to ship on other Unix-like systems.

Timeline

• 1991: mkfs.fat lineage begins with Linus Torvalds' FAT/MS-DOS filesystem creation utility.
• 1993: fsck.fat lineage begins with Werner Almesberger's FAT checker.
• 1998: Roman Hodek adds Atari format support, FAT32 support, and large-filesystem work.
• 2015: Version 3.0.28 makes fsck.fat default to interactive repair mode.
• 2016: Version 4.0 makes the tools portable beyond Linux and converts the build to autotools.
• 2017: Version 4.1 adds a test suite.
• 2021: Version 4.2 expands fatlabel, fsck, mkfs, compatibility, and Year 2038 handling.

Related projects

• dosfstools is related to the Linux FAT/vfat/msdos filesystem stack, mtools, historical DOS/Windows FAT implementations, SD-card formatting expectations, and the older compatibility command names dosfsck, mkdosfs, and dosfslabel.

Sources

• https://github.com/dosfstools/dosfstools
• https://raw.githubusercontent.com/dosfstools/dosfstools/master/NEWS
• https://raw.githubusercontent.com/dosfstools/dosfstools/master/src/mkfs.fat.c
• https://raw.githubusercontent.com/dosfstools/dosfstools/master/src/fsck.fat.c
• https://formulae.brew.sh/formula/dosfstools