How to query CentOS View System kernel version, system version, 32-bit or 64-bit

To view the version of the CentOS kernel:

1) [Root@localhost ~]# cat/proc/version
Linux version 2.6.18-194.el5 (mockbuild@builder10.centos.org) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Fri A PR 2 14:58:14 EDT 2010

2)

[Root@localhost ~]# Uname-a
Linux localhost.localdomain 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:14 EDT x86_64 x86_64 x86_64 gnu/linux

3)

[Root@localhost ~]# Uname-r
2.6.18-194.el5

2. View Linux version:

1 List all version information,

[Root@localhost ~]# Lsb_release-a
LSB Version:: core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32: Graphics-3.1-noarch
Distributor Id:centos
Description:centos Release 5.5 (Final)
release:5.5
Codename:final

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

2 Execute the Cat/etc/issue, for example, as follows:

[Root@localhost ~]# Cat/etc/issue
CentOS Release 5.5 (Final)
Kernel R on a m

3 Execute the Cat/etc/redhat-release, for example, as follows:

[Root@localhost ~]# Cat/etc/redhat-release
CentOS Release 5.5 (Final)

Check to see if the system is 64-bit or 32-bit:

1, getconf long_bit or getconf word_bit

[Root@localhost ~]# getconf Long_bit
64

2, File/bin/ls

[Root@localhost ~]# File/bin/ls
/bin/ls:elf 64-bit LSB executable, AMD x86-64, version 1 (SYSV), for Gnu/linux 2.6.9, dynamically linked (uses shared Lib s), for Gnu/linux 2.6.9, stripped

3, Lsb_release-a

[Root@localhost ~]# Lsb_release-a
LSB Version:: core-3.1-amd64:core-3.1-ia32:core-3.1-noarch:graphics-3.1-amd64:graphics-3.1-ia32: Graphics-3.1-noarch
Distributor Id:centos
Description:centos Release 5.5 (Final)
release:5.5
Codename:final

In Linux, we need to manipulate anything to use the command mode to operate, so if you want to master Linux server friends can see more of this tutorial, as we have seized the system version of the use of a few lines of command oh.