4.1 KiB
Monitor Linux System Performance Using Nmon
Nmon (also known as Nigel’s Monitor) is a computer performance system monitor tool for the AIX and Linux operating systems developed by IBM employee Nigel Griffiths. The tool displays onscreen or saves to a data file the operating system statistics to aid in the understanding of computer resource use, tuning options and bottlenecks. This system benchmark tool gives you a huge amount of important performance information in one go with a single command. You can easily monitor your system’s CPU, memory, network, disks, file systems, NFS, top processes, resources and power micro-partition information using Nmon.
Installing Nmon
By default nmon is available in the Ubuntu repository. You can easily install nmon by running the following command:
sudo apt-get install nmon
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.
nmon
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 Nmonh: to see help screenc: see CPU statsm: see memory statsd: see disk statsk: see kernel statsn: see network statsN: see NFS statsj: see file system statst: see top processV: see virtual memory statsv: 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.
via: https://www.maketecheasier.com/monitor-linux-system-performance/
作者：Hitesh Jethva 译者：译者ID 校对：校对者ID