Memory usage shown with `free` command does not match the utilization from System Monitor

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When I am using free -m to check memory status, I get the following:



$ free -m
 total used free shared buff/cache available
Mem: 7641 5125 188 739 2327 1476
Swap: 3755 0 3755


This shows 67.07% in used memory and 30.05% in buffered/cache.



However when I look at the System Monitor (I am using Ubuntu 18.04), I see this:



Memory
5.9 GB (78.8%) of 7.5 GB


These two do not match up. Can someone shed some light on this?






linux bash memory






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    up vote
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    down vote

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    When I am using free -m to check memory status, I get the following:



    $ free -m
     total used free shared buff/cache available
    Mem: 7641 5125 188 739 2327 1476
    Swap: 3755 0 3755


    This shows 67.07% in used memory and 30.05% in buffered/cache.



    However when I look at the System Monitor (I am using Ubuntu 18.04), I see this:



    Memory
    5.9 GB (78.8%) of 7.5 GB


    These two do not match up. Can someone shed some light on this?






    linux bash memory






    share







    New contributor




    NurShomik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
    Check out our Code of Conduct.





















      up vote
      -1
      down vote

      favorite









      up vote
      -1
      down vote

      favorite











      When I am using free -m to check memory status, I get the following:



      $ free -m
       total used free shared buff/cache available
      Mem: 7641 5125 188 739 2327 1476
      Swap: 3755 0 3755


      This shows 67.07% in used memory and 30.05% in buffered/cache.



      However when I look at the System Monitor (I am using Ubuntu 18.04), I see this:



      Memory
      5.9 GB (78.8%) of 7.5 GB


      These two do not match up. Can someone shed some light on this?






      linux bash memory






      share







      New contributor




      NurShomik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.











      When I am using free -m to check memory status, I get the following:



      $ free -m
       total used free shared buff/cache available
      Mem: 7641 5125 188 739 2327 1476
      Swap: 3755 0 3755


      This shows 67.07% in used memory and 30.05% in buffered/cache.



      However when I look at the System Monitor (I am using Ubuntu 18.04), I see this:



      Memory
      5.9 GB (78.8%) of 7.5 GB


      These two do not match up. Can someone shed some light on this?






      linux bash memory




      linux bash memory





      share







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      NurShomik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
      Check out our Code of Conduct.










      share







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      NurShomik is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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