ecinx@ecinx-ThinkPad-X201-Tablet:~$ free -m
             total       used       free     shared    buffers     cached
Mem:          2878       2366        512          0          4       1559
-/+ buffers/cache:        802       2076
Swap:         3813       1388       2425

ecinx@ecinx-ThinkPad-X201-Tablet:~$ sudo apt-get install iotop