[root@sre01 ~]# free
total used free shared buff/cache available
Mem: 995748 175960 446008 7856 373780 663344
Swap: 2097148 0 2097148
[root@sre01 ~]# free -h
total used free shared buff/cache available
Mem: 972M 171M 435M 7.7M 365M 647M
Swap: 2.0G 0B 2.0G