Welcome to NILFS

NILFS is a log-structured file system supporting versioning of the entire file system and continuous snapshotting, which allows users to even restore files mistakenly overwritten or destroyed just a few seconds ago.

NILFS was developed by NTT Laboratories and published as an open-source software under GPL license, and now available as a part of Linux kernel.

This site provides information and resources related to the NILFS filesystem.

''www.nilfs.org'' has been reopened as a fake site by a third party after we abandoned the domain in September 2014. The fake site defaces the original content, leading visitors to unrelated websites, so please be careful not to go to the site mistakenly. NILFS community and NTT are absolutely not related to this fake site.

The official NILFS website is nilfs.sourceforge.io. Please use these sites when accessing information related to NILFS.

Latest News

• NILFS utilities 2.2.12 was released. A minor release that fixes an issue where the chcp command would crash when an invalid argument was specified, and fixes one warning that was output in the latest build environment. For details, please see nilfs-utils 2.2.12 release (or commits).
  -- Sep 22, 2025 JST.
• Published nilfs2-kmod10, a standalone kernel module for CentOS Stream 10. Please note that this kernel module release is experimental, and depending on future changes to the distro kernel, there is a high possibility that problems may arise, such as the inability to build or a loss of OS stability. For details, please see nilfs2-kmod10 releases (or ChangeLog, commits).
  -- Aug 21, 2024 JST.
• Released a modified version of the standalone kernel module for RHEL 9 clones to fix a panic that occurs with newer CentOS Stream 9 kernels (RHEL_RELEASE >= 375). For details, please see nilfs2-kmod9 releases (or ChangeLog, commits).
  -- Apr 17, 2024 JST.

Old news