[nzlug] check file system

[Bruce Clement]

You can also query the currently "mounted" (active) file systems with the
mount command. This produces output like:
        bruce at server:~> mount
        /dev/hda3 on / type reiserfs (rw,acl,user_xattr)
        proc on /proc type proc (rw)
        sysfs on /sys type sysfs (rw)
        tmpfs on /dev/shm type tmpfs (rw)
        devpts on /dev/pts type devpts (rw,mode=0620,gid=5)
        /dev/hda2 on /boot type reiserfs (rw,acl,user_xattr)
        /dev/hdb1 on /windows/C type vfat
(rw,noexec,nosuid,nodev,gid=100,umask=0002,iocharset=utf8)
        usbfs on /proc/bus/usb type usbfs (rw)
        nfsd on /proc/fs/nfsd type nfsd (rw)