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free

Check RAM status of machine​

$ free
              total        used        free      shared  buff/cache   available
Mem:       32559648     5121376      705696      756992    26732576    26172084
Swap:       2097148        3072     2094076

-h to get information in human readable format​

$ free -h
              total        used        free      shared  buff/cache   available
Mem:           31Gi       4.8Gi       768Mi       721Mi        25Gi        25Gi
Swap:         2.0Gi       3.0Mi       2.0Gi