root@OpenWrt:~# df -h
Filesystem                Size      Used Available Use% Mounted on
none                     14.9M     52.0k     14.9M   0% /tmp
/dev/mtdblock/4           2.1M      1.4M    704.0k  67% /jffs
/jffs                     1.1M      1.1M         0 100% /
root@OpenWrt:~# free
              total         used         free       shared      buffers
  Mem:        30520        14812        15708            0         1148
 Swap:            0            0            0
Total:        30520        14812        15708