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Red Hat – Free command to monitor memory


The free command displays both free and used memory.



Free -m

Free can display free memory in megabytes (easier to read)

free -m

Free -s 15

Poll free memory in Seconds (impress your mates)

free -s

You can combine both

Free -m -s 15    (or)

Free -s 15 -m

free polling

******Second tool



vmstat 10 3


vmstat [delay count]

example: vmstat 10 3

  1. delay is the delay between updates in seconds
  2. count is the number of updates

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