List some tools used to test the stability of Linux systems

Title: Linux system stability stress testing tools and code examples

Introduction:
In computer systems, stability is a very important indicator. Especially for devices that run for a long time such as servers, their stability is particularly important. As Linux is a stable and reliable operating system, stress testing tools for its stability are crucial. This article will introduce several commonly used Linux system stability stress testing tools, and attach specific code examples to help readers better understand and apply these tools.

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1. Stress-ng
   Stress-ng is a powerful, flexible and scalable Linux system stress testing tool. It can create various loads such as CPU, memory, hard disk, I/O, etc. to test the stability and performance of the system under high load conditions. Here is a simple Stress-ng code example to simulate CPU load:

stress-ng --cpu 8 --timeout 60s

The above command will create 8 CPU loads on the system and run for 60 seconds.

2. Memtester
   Memtester is a tool used to test system memory stability. By injecting large amounts of data into system memory and reading it, you can test the stability of your system under high memory loads. The following is a basic Memtester code example:

memtester 1G 5

The above command will inject 1GB of data into the system and perform read and write tests in 5 loops.

3. Fio
   Fio is a flexible and powerful I/O performance testing tool that can test the stability and performance of the system under different loads. The following is a simple Fio code example for sequential write and random read testing:

fio --name=seq-write --ioengine=sync --rw=write --bs=4k --size=1G --numjobs=1 --time_based --runtime=60s
fio --name=rand-read --ioengine=sync --rw=randread --bs=4k --size=1G --numjobs=1 --time_based --runtime=60s

The above command will perform two types of I/O testing, sequential writing and random reading. , each test runs for 60 seconds.

4. Netperf
   Netperf is a tool widely used to test network performance and can evaluate the stability and performance of the system in terms of network communication. The following is a simple Netperf code example for TCP network performance testing:

netperf -H <目标IP> -t TCP_STREAM

The above command will connect to the specified target IP and perform TCP flow testing.

Conclusion:
Conducting stability stress testing in Linux systems is an important means to ensure system stability and performance. This article introduces several commonly used Linux system stability stress testing tools and attaches corresponding code examples. Readers can choose the stress testing tool that suits them based on actual needs to evaluate the stability and performance of the system. At the same time, more detailed and in-depth stress testing can be performed by adjusting parameters in the code examples. I hope this article will be helpful to readers in Linux system stability stress testing.

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