This tutorial by shows us how to show mounted file systems in FreeBSD.

I recently switched from MS-Windows server to a FreeBSD Unix server. How can I see list of mounted file systems on a FreeBSD based Unix server using command line options?

Tutorial details
Difficulty Easy (rss)
Root privileges No
Requirements FreeBSD
Estimated completion time 1m

The command to view mounted files systems, to mount or add any local devices such USB,DVD/CD or remote file systems such asNFS, SAMBA shares or files is the mount command on a FreeBSD operating systems.

How can I list mounted local and remote file systems?

This will list mounted remote and local file systems, run:
$ mount
Sample outputs:

/dev/ada0p2 on / (ufs, local, journaled soft-updates)
devfs on /dev (devfs, local, multilabel)
192.168.1.10:/exports/nas01/data on /mnt/nfs (nfs)

The first field displays the special device such as /dev/ada0p2 or remote file system such as 192.168.1.10:/exports/nas01/data mounted on second field. The second field is the mount point for the file system displayed in the first field. Adding the -v flag will add IDs too:
$ mount -v

Check out the full tutorial: http://www.cyberciti.biz/faq/freebsd-unix-show-mounted-file-systems/