root@router:~# df -h
Filesystem Size Used Available Use% Mounted on
/dev/root 1.0M 1.0M 0 100% /rom
none 7.0M 0 7.0M 0% /rom/mnt
none 7.0M 48.0k 7.0M 1% /tmp
/dev/mtdblock/4 2.2M 2.1M 40.0k 98% /
root@router:~# mount
/dev/root on /rom type squashfs (ro)
none on /dev type devfs (rw)
none on /rom/mnt type tmpfs (ro)
none on /rom/mnt/proc type proc (rw)
none on /tmp type tmpfs (rw,nosuid,nodev)
none on /dev/pts type devpts (rw)
/dev/mtdblock/4 on / type jffs2 (rw)
none on /proc type proc (rw)