Installing Nmon
By default nmon is available in the Ubuntu repository. You can easily install nmon by running the following command:
How to Use Nmon to Monitor Linux Performance
Once the installation has been finished, you can launch it by typing the nmon command in the terminal. You wI’ll see the following output:
You can see from the above screenshot that the nmon command-line utility runs completely in interactive mode, and you can easily toggle statistics using shortcut keys. You can use the following nmon keyboard shortcuts to display different system stats: q : to stop and exit Nmon h : to see help screen c : see CPU stats m : see memory stats d : see disk stats k : see kernel stats n : see network stats N : see NFS stats j : see file system stats t : see top process V : see virtual memory stats v : verbose mode
Check CPU by Processor
If you would like to collect some statistics on CPU performance, you should hit the c key on the keyboard. After hitting the c key you wI’ll see the following output.
Check Top Process Statistics
To get stats on top processes that are running on your system, press the t key on your keyboard. You will see the following output.
Check Network Statistics
To get the network stats of your Linux system, just press the n key on your keyboard. You wI’ll see the following output:
Disk I/O Graphs
Use the d key to get information about disks. You wI’ll see the following output:
Check Kernel Information
A most important key to use with this tool is k; it is used to display some brief information on the kernel of your system. You will see the following output after hitting the k key on your keyboard.
Get System Information
A very useful key for every system admin is the r key which is used to give information on different resources such as machine architecture, operating system version, Linux version and CPU. You will see the following output by hitting the r key.
Conclusion
There are many other tools that can do the same job of the Nmon, but Nmon is so usee friendly for a Linux beginner. Please feel free to comment if you have any questions.
