How to view system and kernel versions under Linux

1. View the kernel version command:

1) [[email protected] ~]# cat/proc/version

Linux version 2.6.9-22.ELSMP ([email protected]) (GCC version 3.4.4 20050721 (Red Hat 3.4.4-2)) #1 SMP Mon Sep 19 18:00:54 EDT 2005

2) [[email protected] ~]# uname-a

Linux q1test01 2.6.9-22.elsmp #1 SMP Mon Sep 18:00:54 EDT 2005 x86_64 x86_64 x86_64 gnu/linux

3) [[email protected] ~]# uname-r

2.6.9-22.elsmp

2. There are three main ways to view Linux versions:

1) Log in to the server to perform lsb_release-a and list all version information, for example:

[Email protected] ~]# lsb_release-a

LSB version:1.3

Distributor Id:redhatenterpriseas

description:red Hat Enterprise Linux as Release 4 (Nahant Update 1)

Release:4

Codename:nahantupdate1

[Email protected] ~]#

This command applies to all Linux, including Redhat, SuSE, Debian, and other distributions.

2) Log in to the Linux execution Cat/etc/redhat-release, as follows:

[Email protected] ~]# cat/etc/redhat-release

Red Hat Enterprise Linux as Release 4 (Nahant Update 1)

[Email protected] ~]#

In this way, you can see the specific version number directly, such as AS4 Update 1

3) log in to Linux to perform rpm-q redhat-release such as the following

[Email protected] ~]# rpm-q redhat-release

redhat-release-4as-2.4

[Email protected] ~]#

In this way, you can see a so-called release number, such as the above example is 2.4

There is a certain correspondence between the release number and the actual version, as follows:

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

Note: The two methods (2) (3) are valid only for Redhat Linux

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How to view system and kernel versions under Linux