Filesystem Type Size Used Avail Use% Mounted on udev devtmpfs 3.8G 0 3.8G 0% /dev tmpfs tmpfs 785M 1.6M 784M 1% /run /dev/sdb1 vfat 15G 2.0G 13G 14% /cdrom /dev/loop0 squashfs 1.8G 1.8G 0 100% /rofs /cow overlay 3.9G 28M 3.9G 1% / tmpfs tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup tmpfs tmpfs 3.9G 4.0K 3.9G 1% /tmp tmpfs tmpfs 785M 44K 785M 1% /run/user/XXX