1.\" $FreeBSD$ 2.\" Garrett A. Wollman, September 1994 3.\" This file is in the public domain. 4.\" 5.Dd December 28, 2020 6.Dt LSVFS 1 7.Os 8.Sh NAME 9.Nm lsvfs 10.Nd list installed virtual file systems 11.Sh SYNOPSIS 12.Nm 13.Op Ar vfsname Ar ... 14.Sh DESCRIPTION 15The 16.Nm 17command lists information about the currently loaded virtual file system 18modules. 19When 20.Ar vfsname 21arguments are given, 22.Nm 23lists information about the specified VFS modules. 24Otherwise, 25.Nm 26lists all currently loaded modules. 27The information is as follows: 28.Pp 29.Bl -tag -compact -width Filesystem 30.It Filesystem 31the name of the file system, as would be used in the 32.Ar type 33parameter to 34.Xr mount 2 35and the 36.Fl t 37option to 38.Xr mount 8 39.It Num 40the filesystem type number. 41.It Refs 42the number of references to this VFS; i.e., the number of currently 43mounted file systems of this type 44.It Flags 45flag bits. 46.El 47.Sh EXAMPLES 48Show information about the 49.Ql ufs 50and 51.Xr devfs 5 52filesystems and check the number of mounts for the former: 53.Bd -literal -offset indent 54$ lsvfs ufs devfs 55Filesystem Num Refs Flags 56-------------------------------- ---------- ----- --------------- 57ufs 0x00000035 2 58devfs 0x00000071 1 synthetic, jail 59 60$ mount -t ufs | wc -l 61 2 62.Ed 63.Sh SEE ALSO 64.Xr mount 2 , 65.Xr getvfsbyname 3 , 66.Xr mount 8 67.Sh HISTORY 68A 69.Nm 70command appeared in 71.Fx 2.0 . 72