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