lsvfs(1)

lsvfs1

List installed virtual file systems

Usage

lsvfs [vfsname ...]

Overview

The lsvfs command lists information about the currently loaded virtual file system modules. When vfsname arguments are given, lsvfs lists information about the specified VFS modules. Otherwise, lsvfs lists all currently loaded modules. The information is as follows:

Filesystem

the name of the file system, as would be used in the type parameter to mount(2) and the -t option to mount(8)

Num

the filesystem type number.

Refs

the number of references to this VFS; i.e., the number of currently mounted file systems of this type

Flags

flag bits.

Examples

Show information about the ‘ufs’ and devfs(4) filesystems and check the number of mounts for the former:

$ lsvfs ufs devfs
Filesystem                              Num  Refs  Flags
-------------------------------- ---------- -----  ---------------
ufs                              0x00000035     2
devfs                            0x00000071     1  synthetic, jail
$ mount -t ufs | wc -l
       2

Releases

87 releases since FreeBSD 2.0.5-RELEASE; the text changed 45 times.

  1. 2.0.5
  2. 2.1.5–2.1.7.1
  3. 2.2.2–2.2.8
  4. 2.2.9
  5. 3.0–3.2
  6. 3.3–3.5.1
  7. 4.0
  8. 4.1–4.2
  9. 4.3–4.7
  10. 4.8–4.11
  11. 5.0–5.2.1
  12. 5.3–5.5
  13. 6.0–6.3
  14. 6.4
  15. 7.0
  16. 7.1
  17. 7.2
  18. 7.3
  19. 7.4
  20. 8.0
  21. 8.1
  22. 8.2
  23. 8.3
  24. 8.4
  25. 9.0
  26. 9.1
  27. 9.2
  28. 9.3
  29. 10.0
  30. 10.1
  31. 10.2
  32. 10.3
  33. 10.4
  34. 11.0
  35. 11.1
  36. 11.2
  37. 11.3
  38. 11.4
  39. 12.0
  40. 12.1
  41. 12.2
  42. 12.3
  43. 12.4
  44. 13.0–13.2
  45. 13.3–14.5
  46. 15.0–16.0

History

A lsvfs command appeared in FreeBSD 2.0.

From base 16.0-CURRENT-20261027-61c70dc16a79 in FreeBSD 16.0-CURRENT (2026-10-27). Parsed by carta from the page's mdoc source.