NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sdb      8:16   0 465.8G  0 disk
├─sdb2   8:18   0     1K  0 part
├─sdb5   8:21   0  63.9G  0 part [SWAP]
└─sdb1   8:17   0 401.9G  0 part /
loop6    7:6    0  86.6M  1 loop /snap/core/4486
loop4    7:4    0 101.9M  1 loop /snap/skype/23
loop2    7:2    0  86.6M  1 loop /snap/core/4571
loop0    7:0    0   137M  1 loop /snap/skype/33
sda      8:0    0   2.7T  0 disk
loop5    7:5    0  86.6M  1 loop /snap/core/4650
loop3    7:3    0 146.2M  1 loop /snap/skype/30

Filesystem      Size  Used Avail Use% Mounted on
udev             34G     0   34G   0% /dev
tmpfs           6.8G  652M  6.1G  10% /run
/dev/sdb1       425G   76G  328G  19% /
tmpfs            34G   39M   34G   1% /dev/shm
tmpfs           5.3M  4.1k  5.3M   1% /run/lock
tmpfs            34G     0   34G   0% /sys/fs/cgroup
/dev/loop4      107M  107M     0 100% /snap/skype/23
tmpfs           6.8G  173k  6.8G   1% /run/user/1001
/dev/loop6       91M   91M     0 100% /snap/core/4486
/dev/loop3      154M  154M     0 100% /snap/skype/30
/dev/loop2       91M   91M     0 100% /snap/core/4571
/dev/loop5       91M   91M     0 100% /snap/core/4650
/dev/loop0      144M  144M     0 100% /snap/skype/33

df -H   # print sizes in powers of 1000 (e.g., 1.1G)

df -h   # print sizes in powers of 1024 (e.g., 1023M)