NMON – Command Line Performance Monitoring Tool

To install nmon

sudo apt-get install nmon

To run nmon


Use the keyboard commands to toggle individual sections on and off:

't' = Top-processes

'm' – Memory S

'j' = Filesystems

'd' or 'D' = Disks (capital D shows different measurements)

'n' = Network

'V' = Virtual Memory

'r' = Resource

'N' = NFS

'k' = kernel

'.' = only busy disks/procs

'q' = quit

​There a good article on how to use it here.


We benefit hugely from resources on the web so we decided we should try and give back some of our knowledge and resources to the community by opening up many of our company’s internal notes and libraries through mini sites like this. We hope you find the site helpful.
Please feel free to comment if you can add help to this page or point out issues and solutions you have found, but please note that we do not provide support on this site. If you need help with a problem please use one of the many online forums.


  1. Tony Burkhart

    2 years ago

    Absolutely perfect, thank you!

  2. Isaac Andy

    3 years ago

    This tool is awesome..
    I wonder does it fit perfectly with my 3.5in LCD screen ..
    Will try that out shortly

  3. Tony

    3 years ago

    Fantastic little tool. Many thanks


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