Why is Linux system stable?

Linux is stable because its kernel is not as large and full of loopholes as other operating systems. The Unix design system shared by Linux has withstood the test of long-term practice. Linux has absorbed the experience of Unix system development over the past quarter century. The Linux operating system embodies the design philosophy of the first modern operating system and a design solution that can stand the test of time. The most eye-catching thing is the development model of Linux development source code, which ensures that any system vulnerabilities can be discovered and corrected in time.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

Why does Linux have such high stability?

People often ask a question: Why does Linux almost never crash? The reason why Linux is stable is that its kernel is not as large and full of loopholes as other operating systems.

Survey data shows that Linux has the same reliability as other Unix systems and large operating systems such as VMS and IBM mainframes. It is not difficult to conclude that the stability of the system mainly depends on the structure of the system design. The architecture of computer hardware has not changed significantly since it was designed in 1981. However, continued backward compatibility makes those applications with poor programming style reluctant to migrate to the latest version of Windows, which greatly hinders the development of system stability. Another crash-prone system, the Macintosh was as famous for its lack of memory protection and preemptive multitasking as its user-friendly interface. Surprisingly, despite being so flawed, the Macintosh didn't crash as often as one might think.

The stability of Linux is not an unexpected exception. Stability is a common denominator of all mainframe computer operating systems. Only WiNdows and MAC sometimes get the error. The Unix design system shared by Linux has withstood the test of long-term practice. Linux has absorbed the experience of Unix system development over the past quarter century. The Linux operating system embodies the design philosophy of the first modern operating system and a design solution that can stand the test of time. The most eye-catching thing is the development model of Linux development source code, which ensures that any system vulnerabilities can be discovered and corrected in time.

As IBM says on its website, Linux is a stable, powerful operating system worth using.

The reasons why Linux is more secure

#1. More excellent patch management tools

In In a Linux system, when you automatically update the system, it will upgrade all software in the system at the same time. In the Ubuntu system, any software product you download will appear in the system's program warehouse. To upgrade it, you only need to click with the mouse. In other Linux distributions, if the downloaded software does not appear in the system's program repository, it is very simple to add it. This design greatly improves users' enthusiasm for updating the system in real time.

2. More robust default settings

The Linux system is inherently designed to be a multi-user operating system. Therefore, even if a user wants to cause malicious damage, the underlying system files are still protected. If, in a very unfortunate situation, any remote malicious code is executed in the system, the harm it brings will be limited to a small local area.

3. Modular design:

The Linux system adopts a modular design. This means that you can remove any system component if it is no longer needed. One benefit that comes from this is that if the user feels that a certain part of the Linux system is not safe, he can remove this component.

4. Better "zero-day attacks" defense tools

Even if you can ensure that your system is updated in real time, this does not mean It means foolproof! Zero-day attacks (zero-day attacks, which refer to attacks that exploit vulnerabilities to launch network attacks before software manufacturers release updated patches for vulnerabilities) are becoming increasingly rampant. In addition, a survey study also showed that it only takes 6 days for attackers to develop malicious attack code for vulnerabilities, while software manufacturers take much longer to launch corresponding Update patch. Therefore, a smart security strategy is crucial in protecting against zero-day attacks.

No matter what type of remote control code attack it is, AppArmor or SELinux can provide detailed and comprehensive protection for the system. There are more and more mainstream Linux distributions that integrate AppArmor (for example, SuSE, Ubuntu Gutsy) or SELinux (Fedora, Debian Etch, Yellow Dog) by default in the system. Even for other distributions, users can easily download and install these two sets of software from the Internet.

5. Open source code architecture:

In Linux systems, when talking about system security, it is more appropriate to use the phrase "what you see is what you get" to describe it. Open source means that any possible software vulnerabilities will be seen by "countless pairs of eyes" and fixed as quickly as possible. And more importantly, this also means that there are no hidden fixes here. As a user, as long as you are willing, you can find out the security problems in your system and take corresponding preventive measures to deal with potential security threats, even if the vulnerability has not been patched at this time.

Advantages of Linux Server

Using a Linux server online provides you with so many advantages. In fact, its advantages outweigh its disadvantages, some of which are:

1. Provides stability because Linux-based servers are not prone to crashes. In the event of a collision, the entire system is unaffected.

2. Reduce vulnerability to potential system threats. Linux is great for blocking or preventing suspicious malware from entering and affecting the overall system's performance.

3. It has durability because it can remain defect-free for a long time and maintain high performance higher than your expectations.

4. Bring old computers back to life. For example, if your computer comes with a Pentium III operating system, you can install it using a Linux operating system and an online server to get it running again.

5. Speak freely, as most Linux distributions are free to download and can be installed on as many computers as you want

6. Plenty available Software and free software

There are a large number of software available on the Linux system, and most of them are free, such as the famous Apache, Samba, PHP, MySQL, etc. The low construction cost makes Linux favored by many enterprises. One of the reasons. Of course, this is inseparable from the excellent performance of Linux, otherwise, cost savings will be meaningless.

7. Good portability and flexibility

Linux system has good portability. It supports almost all CPU platforms, which makes it easy to tailor and customize. We can put Linux in storage media such as U disks and CDs, and it can also be widely used in the embedded field.

If you want to experience the Linux system without installing it, you can download a Live DVD version of the Linux image online, burn it into a CD and put it into the optical drive or use virtual machine software to directly load the image file and set CMOS/BIOS When booting from the CD, the system will automatically load the CD files and boot into the Linux system.

8. Supports almost all network protocols and development languages

I often have beginner friends ask me whether Linux does not support the TCP/IP protocol well or whether the Java development environment is not working well. Questions like that. As mentioned earlier in the history of UNIX development, the UNIX system developed together with the C language and TCP/IP protocol, and Linux is a type of UNIX. The C language has derived from the current mainstream languages ​​​​PHP, Java, C, etc. , and which network protocol has nothing to do with TCP/IP? Therefore, Linux has good support for network protocols and development languages.

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