GNU Coreutils - Supported Filesystems

Overview

GNU coreutils programs tail(1) and stat(1) contain list of file systems in order to display their names and implement efficient file monitoring with tail -f.

tail: unrecognized file system type 0xNNNNNNNN for 'FILE'. please
report this to bug-coreutils@gnu.org. reverting to polling

This warning is harmless - tail still operates correctly on your filesystem, although not as efficient as possible.

1. The filesystem is unknown and its identifier is not yet in coreutils.
2. The filesystem is known, but your installed coreutils version is too old.

The list below details all currently supported filesystems. If you find the identifier (0xNNNNNNNN) in the list, it means the filesystem is already configured in coreutils, and it is likely the version you are using is too old. To find the installed version run tail --version.

If the identifier is not found in the list, please report it to coreutils@gnu.org with additional information about the operating system and the filesystem (e.g. output of uname -a and df -T .).

Supported Filesystems

Additional Information

Coreutils version 8.25 and later no longer emit this warning. Running tail -f on unrecognized file systems will silently fallback to using the inotify interface. This change was made as coreutils' code is now routeinely synchronized with the Linux kernel, and there's less of a need for users to notify about new file systems.

For more information visit the GNU Coreutils web page.