Jag antar att Du menar från telnet-prompten.
root@vusolo:~# df
Filesystem 1K-blocks Used Available Use% Mounted on
ubi0:rootfs 101724 58268 43456 57% /
devtmpfs 46548 4 46544 0% /dev
tmpfs 64 0 64 0% /media
tmpfs 46680 340 46340 1% /var/volatile
root@vusolo:~# mount
rootfs on / type rootfs (rw)
ubi0:rootfs on / type ubifs (rw,sync,relatime)
devtmpfs on /dev type devtmpfs (rw,relatime,size=46548k,nr_inodes=11637,mode=755
)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs