/proc/filesystems

A text listing of the filesystems which were compiled into the kernel.

Incidentally, this is used by mount(1) to cycle through different filesystems when none is specified.

The "nodev" string in the first column means that filesystem does not require a block device to be mounted, it's so called virtual filesystem.

Example output:

nodev   sysfs

nodev   rootfs

nodev   bdev

nodev   proc

nodev   cpuset

nodev   debugfs

nodev   sockfs

nodev   pipefs

nodev   futexfs

nodev   tmpfs

nodev   inotifyfs

nodev   eventpollfs

nodev   configfs

nodev   devpts

        ext3

nodev   ramfs

nodev   hugetlbfs

        vfat

        iso9660

nodev   fuse

        fuseblk

nodev   fusectl

        udf

nodev    nfs

nodev　　 nfs4

　　　　　　yaffs

　　　　　　yaffs2

nodev   mqueue

nodev   kvmfs

nodev   oprofilefs

 

from:http://www.linuxinsight.com/proc_filesystems.html