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GNU Coreutils - Supported File systems
Overview
GNU coreutils programs
tail(1) and
stat(1) contain
lists of file systems in order to display their names and implement efficient
file monitoring with tail -f.
Under certain conditions tail emits the following warning:
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 file system, although not as efficiently as possible.
- The file system is unknown and its identifier is not yet in coreutils.
- The file system is known, but your installed coreutils version is too old.
The list below details all currently supported file systems.
If you find the identifier (0xNNNNNNNN) in the list,
it means the file system 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 file system (e.g. output
of uname -a and df -T .).
Supported File systems
| Identifier | File System | Minimal Version | Revision | Remarks |
|---|---|---|---|---|
| 0x45584653 | exfs | v8.30 | v8.29-17-g0753c3f | |
| 0x5A3C69F0 | aafs | v8.28 | v8.27-99-g3ebdc3e | |
| 0x07655821 | rdt | v8.27 | v8.26-67-g79a5cb1 | |
| 0xFE534D42 | smb2 | v8.26 | v8.25-29-g99dd47e | |
| 0x53464846 | wslfs | v8.26 | v8.25-25-g8c81638 | |
| 0x5346314D | m1fs | v8.26 | v8.25-17-g8faf269 | |
| 0x7C7C6673 | prl_fs | v8.26 | v8.25-16-gd33f1fb | |
| 0x13661366 | balloon-kvm-fs | v8.26 | v8.25-128-g286a401 | |
| 0x63677270 | cgroup2fs | v8.26 | v8.25-128-g286a401 | |
| 0x64646178 | daxfs | v8.26 | v8.25-128-g286a401 | |
| 0x58295829 | zsmallocfs | v8.26 | v8.25-128-g286a401 | |
| 0x61636673 | acfs | v8.25 | v8.24-83-g0daa359 | |
| 0xCAFE4A11 | bpf_fs | v8.25 | v8.24-83-g0daa359 | |
| 0x73727279 | btrfs_test | v8.25 | v8.24-83-g0daa359 | |
| 0x6E736673 | nsfs | v8.25 | v8.24-83-g0daa359 | |
| 0x794C7630 | overlayfs | v8.25 | v8.24-111-g1118f32 | |
| 0x74726163 | tracefs | v8.25 | v8.24-83-g0daa359 | |
| 0x013111A8 | ibrix | v8.24 | v8.23-141-ge60547d | |
| 0x62656570 | configfs | v8.23 | v8.22-101-g56c9a43 | |
| 0x482B | hfs+ | v8.23 | v8.22-18-gb938b6e | |
| 0x4858 | hfsx | v8.23 | v8.22-18-gb938b6e | |
| 0x00C0FFEE | hostfs | v8.23 | v8.22-100-g695a0b5 | |
| 0xC97E8168 | logfs | v8.23 | v8.22-101-g56c9a43 | |
| 0xDE5E81E4 | efivarfs | v8.22 | v8.21-25-g4c49dc8 | |
| 0x5DF5 | exofs | v8.22 | v8.21-25-g4c49dc8 | |
| 0xF2F52010 | f2fs | v8.22 | v8.21-25-g4c49dc8 | |
| 0x43415D53 | smackfs | v8.22 | v8.21-196-gee7512c | |
| 0xBEEFDEAD | snfs | v8.22 | v8.21-42-ge414ff4 | |
| 0x24051905 | ubifs | v8.22 | v8.21-25-g4c49dc8 | |
| 0x00C36400 | ceph | v8.21 | v8.20-65-gc321f74 | |
| 0xBACBACBC | vmhgfs | v8.20 | v8.19-142-g2dad87f | |
| 0x565A4653 | vzfs | v8.20 | v8.19-108-g97b786a | |
| 0x2FC12FC1 | zfs | v8.20 | v8.19-10-gc9888e0 | |
| 0x61756673 | aufs | v8.18 | v8.17-29-gb0d8d32 | |
| 0xAAD7AAEA | panfs | v8.18 | v8.17-12-g5fdd5c6 | |
| 0x62646576 | bdevfs | v8.17 | v8.16-51-ge121071 | |
| 0x11307854 | inodefs | v8.17 | v8.16-51-ge121071 | |
| 0x68191122 | qnx6 | v8.17 | v8.16-51-ge121071 | |
| 0x19830326 | fhgfs | v8.15 | v8.14-99-g896529709 | |
| 0x50495045 | pipefs | v8.15 | v8.14-103-gb1230020d | |
| 0x47504653 | gpfs | v8.13 | v8.12-110-g473b4fc1e | |
| 0x19800202 | mqueue | v8.13 | v8.12-101-g171e1b981 | |
| 0x6165676C | pstorefs | v8.13 | v8.12-101-g171e1b981 | |
| 0xF15F | ecryptfs | v8.12 | v8.11-16-gbd6cea345 | |
| 0x01021997 | v9fs | v8.12 | v8.11-16-gbd6cea345 | |
| 0x65735546 | fuseblk | v8.3 | v8.2-18-g4b449caf2 | |
| 0x01161970 | gfs/gfs2 | v8.3 | v8.2-19-g53db8d647 | |
| 0x6B414653 | k-afs | v8.3 | v8.2-19-g53db8d647 | |
| 0x7461636F | ocfs2 | v8.3 | v8.2-19-g53db8d647 | |
| 0x67596969 | rpc_pipefs | v8.3 | v8.2-18-g4b449caf2 | |
| 0x534F434B | sockfs | v8.3 | v8.2-6-g207a978e6 | |
| 0x5346414F | afs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x3434 | nilfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x73636673 | securityfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0xF97CFF8C | selinux | v8.1 | v8.0-5-geb5f06f2a | |
| 0x09041934 | anon-inode FS | v8.1 | v8.0-5-geb5f06f2a | |
| 0x9123683E | btrfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x0027E0EB | cgroupfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0xFF534D42 | cifs | v8.1 | v8.0-4-g8e3239071 | |
| 0xABBA1974 | xenfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x453DCD28 | cramfs-wend | v8.1 | v8.0-5-geb5f06f2a | |
| 0x2BAD1DEA | inotifyfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x64626720 | debugfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x4244 | hfs | v8.1 | v8.0-4-g8e3239071 | |
| 0x0BAD1DEA | futexfs | v8.1 | v8.0-5-geb5f06f2a | |
| 0x4D5A | minix3 | v8.1 | v8.0-5-geb5f06f2a | |
| 0x0BD00BD0 | lustre | v7.1 | v7.0-3-ga36f4cb45 | |
| 0xADF5 | adfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x0187 | autofs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x42465331 | befs | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x1BADFACE | bfs | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x42494E4D | binfmt_misc | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | (initially called BINFMT_MISC) |
| 0x73757245 | coda | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x1373 | devfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x00414A53 | efs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x65735543 | fusectl | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x958458F6 | hugetlbfs | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x07C0 | jffs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x72B6 | jffs2 | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x3153464A | jfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x6E667364 | nfsd | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x9FA1 | openprom | v7.0 | COREUTILS-6_9-214-gcbdbbc4a5 | |
| 0x002F | qnx4 | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x858458F6 | ramfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x15013346 | udf | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x54190100 | ufs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | (UFS BYTESWAPPED) |
| 0x9FA2 | usbdevfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0xA501FCF5 | vxfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x58465342 | xfs | v7.0 | COREUTILS-6_9-213-g505eee2f3 | |
| 0x73717368 | squashfs | v5.3 | COREUTILS-5_2_1-1305-g7ee151d22 | |
| 0x62656572 | sysfs | v5.3 | COREUTILS-5_2_1-1305-g7ee151d22 | |
| 0x1CD1 | devpts | v5.1 | COREUTILS-5_0-84-g641cba7b3 | |
| 0xADFF | affs | v5.0 | (version v5.0 or earlier) | |
| 0x012FF7B7 | coh | v5.0 | ||
| 0x28CD3D45 | cramfs | v5.0 | ||
| 0x137D | ext | v5.0 | ||
| 0xEF53 | ext2/ext3 | v5.0 | ||
| 0xEF51 | ext2 | v5.0 | ||
| 0x4006 | fat | v5.0 | ||
| 0xF995E849 | hpfs | v5.0 | ||
| 0x9660 | isofs | v5.0 | ||
| 0x4004 | isofs | v5.0 | ||
| 0x4000 | isofs | v5.0 | ||
| 0x137F | minix | v5.0 | ||
| 0x138F | minix (30 char.) | v5.0 | ||
| 0x2468 | minix v2 | v5.0 | ||
| 0x2478 | minix v2 (30 char.) | v5.0 | ||
| 0x4D44 | msdos | v5.0 | ||
| 0x564C | novell | v5.0 | ||
| 0x6969 | nfs | v5.0 | ||
| 0x5346544E | ntfs | v5.0 | ||
| 0x9FA0 | proc | v5.0 | ||
| 0x52654973 | reiserfs | v5.0 | ||
| 0x7275 | romfs | v5.0 | ||
| 0x517B | smb | v5.0 | ||
| 0x012FF7B6 | sysv2 | v5.0 | ||
| 0x012FF7B5 | sysv4 | v5.0 | ||
| 0x01021994 | tmpfs | v5.0 | ||
| 0x00011954 | ufs | v5.0 | ||
| 0x012FF7B4 | xenix | v5.0 | ||
| 0x012FD16D | xia | v5.0 |
Additional Information
Coreutils
version 8.25
and later no longer emit this warning. Running tail -f
on unrecognized file systems will silently fallback
from trying to use the inotify interface to polling.
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.
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