Several ways to view the Linux version number

(1) Lsb_release command view a command for the LSB (Linux standard Base) standards developed by FSG (Free Standards Group) to view distribution information for Linux compatibility

[Email protected] oracle]# lsb_release-h

FSG Lsb_release v2.0 Prints certain LSB (Linux standard Base) and
Distribution information.


usage:lsb_release [OPTION] ...
With no OPTION specified defaults to-v.


Options:
-V,--version
Display the version of the LSB specification against which the distribution is compliant.
-I.,--id
Display The string ID of the Distributor.
-D,--description
Display the single line text description of the distribution.
-R,--release
Display the release number of the distribution.
-C,--codename
Display the codename according to the distribution release.
-A,--all
Display all of the above information.
-S,--short
Use short output format for information requested by other options (or version if none).
-H,--help
Display this message.
[Email protected] oracle]# lsb_release-v
LSB Version:: core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64: Printing-4.0-noarch
[Email protected] oracle]# lsb_release-i
Distributor Id:redhatenterpriseserver
[Email protected] oracle]# lsb_release-d
description:red Hat Enterprise Linux Server release 6.3 (Santiago)
[[Email protected] oracle]# C
-BASH:C: Command not found
[Email protected] oracle]# lsb_release-c
Codename:santiago
[Email protected] oracle]# lsb_release-a
LSB Version:: core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64: Printing-4.0-noarch
Distributor Id:redhatenterpriseserver
description:red Hat Enterprise Linux Server release 6.3 (Santiago)
release:6.3
Codename:santiago
[Email protected] oracle]# lsb_release-s
: Core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch

[Email protected] oracle]#

(2)/etc/issue view, is the default release version number information when the system is installed. Usually the contents of the file will not change after the system is installed.

[Email protected] oracle]# cat/etc/issue
Oracle Linux Server Release 6.3
Kernel \ r on an \m


[Email protected] oracle]#

(3)/proc/version and uname-a display the same content, showing the Linux kernel version.

[Email protected] oracle]# cat/proc/version
Linux version 2.6.39-200.24.1.el6uek.x86_64 ([email protected]) (GCC version 4.4.6 20110731 (Red Hat 4.4.6-3) (gcc)) #1 S MP Sat June 02:39:07 EDT 2012
[Email protected] oracle]# uname-r
2.6.39-200.24.1.el6uek.x86_64
[Email protected] oracle]# uname-a
Linux enmoteam1 2.6.39-200.24.1.el6uek.x86_64 #1 SMP Sat June 02:39:07 EDT x86_64 x86_64 x86_64 gnu/linux
[Email protected] oracle]#

(4)/etc/redhat-release can see the detailed version
[Email protected] ~]$ cat/etc/redhat-release
Red Hat Enterprise Linux Server release 6.3 (Santiago)
[Email protected] ~]$

Several ways to view the Linux version number