How to view the Linux version

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.