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# free
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> Display amount of free and used memory in the system.
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- Display system memory:
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`free`
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- Display memory in Bytes/KB/MB/GB:
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`free -{{b|k|m|g}}`
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- Display memory in human readable units:
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`free -h`
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- Refresh the output every 2 seconds:
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`free -s {{2}}`
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