df -h command

charles@ZentyalCJ:~/Downloads$ df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/ZentyalCJ-root
                       71G   70G     0 100% /
none                  1.8G  256K  1.8G   1% /dev
none                  1.8G     0  1.8G   0% /dev/shm
none                  1.8G  380K  1.8G   1% /var/run
none                  1.8G  4.0K  1.8G   1% /var/lock
none                  1.8G     0  1.8G   0% /lib/init/rw
/dev/mapper/vg0-lv0   2.7T  1.6T  1.1T  61% /mnt/data
/dev/sda1             228M  145M   71M  68% /boot