Practical notes: how to find the Linux version

When you study Linux, you will surely encounter many problems. In the face of these problems, we should solve the problems. Let's talk about some small problems I have found. How do you know which Linux version you are using? The following methods will help you solve the problem!

1. Run the following command to view the kernel version:
1) [root @ q1test01 ~] # Cat/proc/version
Linux version 2.6.9-22. ELsmp (bhcompile@crowe.devel.redhat.com) (gcc version 3.4.4 20050721 (Red Hat 3.4.4-2) #1 SMP Mon Sep 19 18:00:54 EDT 2005

2) [root @ q1test01 ~] # Uname-
Linux q1test01 2.6.9-22. ELsmp #1 SMP Mon Sep 19 18:00:54 EDT 2005 x86_64 x86_64 x86_64 GNU/Linux

3) [root @ q1test01 ~] # Uname-r
2.6.9-22. ELsmp

2. view the Linux version:
1) log on to the server and execute lsb_release-a to list all version information, for example:
[Root@3.5.5Biz-46 ~] # [Root @ q1test01 ~] # Lsb_release-
LSB Version: core-3.0-amd64: core-3.0-ia32: core-3.0-noarch: graphics-3.0-
Ia32: graphics-3.0-noarch
Distributor ID: RedHatEnterpriseAS
Description: Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
Release: 4
Codename: NahantUpdate2
Note: This command applies to all Linux releases, including Redhat, SuSE, and Debian.

2) log on to Linux and run cat/etc/issue, for example:
[Root @ q1test01 ~] # Cat/etc/issue
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
Kernel \ r on an \ m

3) log on to Linux and run cat/etc/redhat-release, for example:
[Root @ q1test01 ~] # Cat/etc/redhat-release
Red Hat Enterprise Linux AS release 4 (Nahant Update 2)
Note: In this mode, you can see the specific version number, such as AS4 Update 1.

4) log on to Linux and execute rpm-q redhat-release, for example:
[Root @ q1test01 ~] # Rpm-q redhat-release
Redhat-release-4AS-3
Note: in this way, you can see a so-called release number. For example, the above example is 3.
There is a certain correspondence between the release number and the actual version, as shown below:
Redhat-release-3AS-1-> Redhat Enterprise Linux AS 3
Redhat-release-3AS-7.4-> Redhat Enterprise Linux AS 3 Update 4
Redhat-release-4AS-2-> Redhat Enterprise Linux AS 4
Redhat-release-4AS-2.4-> Redhat Enterprise Linux AS 4 Update 1
Redhat-release-4AS-3-> Redhat Enterprise Linux AS 4 Update 2
Redhat-release-4AS-4.1-> Redhat Enterprise Linux AS 4 Update 3
Redhat-release-4AS-5.5-> Redhat Enterprise Linux AS 4 Update 4

Other methods: 3rd) and 4) are only valid for Redhat Linux. I hope you will learn how to find the Linux version through this article.

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