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101 lines
4.1 KiB
Markdown
101 lines
4.1 KiB
Markdown
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Monitor Linux System Performance Using Nmon
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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.
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### Installing Nmon ###
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By default nmon is available in the Ubuntu repository. You can easily install nmon by running the following command:
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sudo apt-get install nmon
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How to Use Nmon to Monitor Linux Performance
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Once the installation has been finished, you can launch it by typing the `nmon` command in the terminal.
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nmon
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You wI’ll see the following output:
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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.
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You can use the following nmon keyboard shortcuts to display different system stats:
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- `q` : to stop and exit Nmon
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- `h` : to see help screen
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- `c` : see CPU stats
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- `m` : see memory stats
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- `d` : see disk stats
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- `k` : see kernel stats
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- `n` : see network stats
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- `N` : see NFS stats
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- `j` : see file system stats
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- `t` : see top process
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- `V` : see virtual memory stats
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- `v` : verbose mode
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### Check CPU by Processor ###
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If you would like to collect some statistics on CPU performance, you should hit the c key on the keyboard.
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After hitting the c key you wI’ll see the following output.
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### Check Top Process Statistics ###
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To get stats on top processes that are running on your system, press the t key on your keyboard.
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You will see the following output.
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### Check Network Statistics ###
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To get the network stats of your Linux system, just press the n key on your keyboard.
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You wI’ll see the following output:
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### Disk I/O Graphs ###
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Use the `d` key to get information about disks.
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You wI’ll see the following output:
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### Check Kernel Information ###
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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.
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You will see the following output after hitting the `k` key on your keyboard.
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### Get System Information ###
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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.
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You will see the following output by hitting the `r` key.
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### Conclusion ###
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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.
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--------------------------------------------------------------------------------
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via: https://www.maketecheasier.com/monitor-linux-system-performance/
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作者：[Hitesh Jethva][a]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]:https://www.maketecheasier.com/author/hiteshjethva/
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