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In linux, version means version, that is, the version identification number. Each operating system has a version identification number, which enables users to know whether the operating system is the latest version and the functions and facilities provided by the system; the version number can be divided into two parts: the major version number and the minor version number.

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

What does version mean in linux

Version number (version number) is the identification number of the version. Every operating system (or broadly speaking, every software) has a version number. The version number allows the user to know whether the operating system used is the latest version and the functions and facilities it provides. Each version number can be divided into two parts: the major version number and the minor version number.

The Linux kernel uses three different version numbering methods.

The first method is used before version 1.0 (including 1.0). The first version is 0.01, followed by 0.02, 0.03, 0.10, 0.11, 0.12, 0.95, 0.96, 0.97, 0.98, 0.99, and then 1.0.

The second method is from 1.0 to 2.6. the number consists of three parts, "A.B.C", with A for the major version number, B for the minor major version number, and C for the smaller last version number.

The third approach, starting with version 2.6.0 in 2004, uses a "time-based" approach. Before version 3. 0, it was a "A.B.C.D" format. Over the past seven years, the first two numbers, A.B., or "2.6", have remained the same, C has increased with the release of the new version, and D represents the number of bug fixes, security updates, new features and drivers added.

The second approach to the Linux kernel changes An only when the kernel has changed significantly (only twice in history, 1.0 in 1994 and 2.0 in 1996). You can judge whether the Linux is stable by the number B, with even B representing the stable version and odd B representing the development version. C represents the number of bug fixes, security updates, new features and drivers.

Take version 2.4.0 as an example, 2 represents the major version number, 4 represents the minor version number, and 0 represents the last version number with minor changes. In the version number, the even-numbered version indicates that this is a stable version that can be used, such as 2.2.5, while the odd-numbered version of the serial number has something new to add, which is not necessarily a very stable test version, such as 2.3.1.

In this way, the stable version comes from the upgrade version number of the previous beta version, while a stable version is no longer developed when it is fully mature.

Version 3.0 is followed by the "A.B.C" format, B increases with the release of the new version, and C represents the number of bug fixes, security updates, new features and drivers. In the third way, even numbers are no longer used for stable versions, and odd numbers for development versions. For example: 3.7.0 does not represent the development version, but the stable version.

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