How to free up memory??

6:00pm up 1 day, 8:19, 1 user, load average: 0.01 0.00, 0.00
72 processes: 71 sleeping, 1 running, 0 zombie, 0 stopped
CPU0 states: 0.1% user, 0.2% system, 0.0% nice, 99.1% idle
CPU1 states: 0.1% user, 0.1% system, 0.0% nice, 99.3% idle
Mem: 2059412K av, 1215140K used, 844272K free, 0K shrd, 748820K buff
Swap: 1052216K av, 400K used, 1051816K free 301588K cached


I have just got a server yesterday with 2GB ram. I noticed that 1200MB of ram already occupied. I dont really understand how could it be. Any idea how to free up those ram. This is a redhat 7.1 with WHM/cpanel box

 

 

 

 

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