lsvfs(1)

list installed virtual file systems

NAME

lsvfs – list installed virtual file systems

SYNOPSIS

lsvfs [vfsname ...]

DESCRIPTION

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

HISTORY

A lsvfs command appeared in FreeBSD 2.0.

History

FreeBSD 16.0-CURRENT (2026-10-27) to FreeBSD 15.0-RELEASE: the text shown here
FreeBSD 14.5-RELEASE to FreeBSD 13.3-RELEASE
FreeBSD 13.2-RELEASE to FreeBSD 13.0-RELEASE
FreeBSD 12.4-RELEASE
FreeBSD 12.3-RELEASE
FreeBSD 12.2-RELEASE
FreeBSD 12.1-RELEASE
FreeBSD 12.0-RELEASE
FreeBSD 11.4-RELEASE
FreeBSD 11.3-RELEASE
FreeBSD 11.2-RELEASE
FreeBSD 11.1-RELEASE
FreeBSD 11.0-RELEASE
FreeBSD 10.4-RELEASE
FreeBSD 10.3-RELEASE
FreeBSD 10.2-RELEASE
FreeBSD 10.1-RELEASE
FreeBSD 10.0-RELEASE
FreeBSD 9.3-RELEASE
FreeBSD 9.2-RELEASE
FreeBSD 9.1-RELEASE
FreeBSD 9.0-RELEASE
FreeBSD 8.4-RELEASE
FreeBSD 8.3-RELEASE
FreeBSD 8.2-RELEASE
FreeBSD 8.1-RELEASE
FreeBSD 8.0-RELEASE
FreeBSD 7.4-RELEASE
FreeBSD 7.3-RELEASE
FreeBSD 7.2-RELEASE
FreeBSD 7.1-RELEASE
FreeBSD 7.0-RELEASE
FreeBSD 6.4-RELEASE
FreeBSD 6.3-RELEASE to FreeBSD 6.0-RELEASE
FreeBSD 5.5-RELEASE to FreeBSD 5.3-RELEASE
FreeBSD 5.2.1-RELEASE to FreeBSD 5.0-RELEASE
FreeBSD 4.11-RELEASE to FreeBSD 4.8-RELEASE
FreeBSD 4.7-RELEASE to FreeBSD 4.3-RELEASE
FreeBSD 4.2-RELEASE to FreeBSD 4.1-RELEASE
FreeBSD 4.0-RELEASE
FreeBSD 3.5.1-RELEASE to FreeBSD 3.3-RELEASE
FreeBSD 3.2-RELEASE to FreeBSD 3.0-RELEASE
FreeBSD 2.2.9-RELEASE
FreeBSD 2.2.8-RELEASE to FreeBSD 2.2.2-RELEASE
FreeBSD 2.1.7.1-RELEASE to FreeBSD 2.1.5-RELEASE
FreeBSD 2.0.5-RELEASE