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Display Linux System Memory

Free command used to check the used and available space of physical memory and swap memory in KB. See the command in action below.

$ free
              total        used        free      shared  buff/cache   available
Mem:        2043880      545924      573704         888      924252     1330060
Swap:        786428       46592      739836

$ free -m
              total        used        free      shared  buff/cache   available
Mem:           1995         538         555           0         902        1293
Swap:           767          45         722

-m is to display in MB.

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