Nokia-N800-50-2:/home/user# df
Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/mtdblock4            2048      2048         0 100% /mnt/initfs
none                       512        88       424  17% /mnt/initfs/tmp
/dev/mtdblock4          257536    215440     42096  84% /
none                       512        88       424  17% /tmp
none                      1024        16      1008   2% /dev
tmpfs                     1024         0      1024   0% /dev/shm
/dev/mmcblk0p1         3326100        20   3157124   0% /media/mmc2
Nokia-N800-50-2:/home/user#
Nokia-N800-50-2:/home/user# mkdir /opt/
mkdir: cannot create directory '/opt/': File exists
Nokia-N800-50-2:/home/user# mkdir /opt
mkdir: cannot create directory '/opt': File exists
Nokia-N800-50-2:/home/user# ls
MyDocs  apps
Nokia-N800-50-2:/home/user#