pi@retropie ~ $ df -h
Filesystem      Size  Used Avail Use% Mounted on
rootfs           29G   19G  8.9G  68% /
/dev/root        29G   19G  8.9G  68% /
devtmpfs        365M     0  365M   0% /dev
tmpfs            74M  424K   74M   1% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           148M     0  148M   0% /run/shm
/dev/mmcblk0p1   57M   19M   39M  33% /boot
pi@retropie ~ $ free
             total       used       free     shared    buffers     cached
Mem:        754336     140472     613864          0      18744      55788
-/+ buffers/cache:      65940     688396
Swap:       102396          0     102396
pi@retropie ~ $ dmesg