root@localhost:~# free -m
              total        used        free      shared  buff/cache   available
Mem:           1995         620         246           0        1128        1195
Swap:             0           0           0
root@localhost:~# free -mh
              total        used        free      shared  buff/cache   available
Mem:          1.9Gi       620Mi       245Mi       0.0Ki       1.1Gi       1.2Gi
Swap:            0B          0B          0B