查看centos内核的版本：
1)[root@localhost ~]# cat /proc/version
linux version 2.6.18-194.el5 ([email protected]) (gcc version 4.1.2 20080704 (red hat 4.1.2-48)) #1 smp fri apr 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 2010 x86_64 x86_64 x86_64 gnu/linux
3)
[root@localhost ~]# uname -r
2.6.18-194.el5
2. 查看linux版本：
1) 列出所有版本信息,
[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
注:这个命令适用于所有的linux，包括redhat、suse、debian等发行版。
2) 执行cat /etc/issue,例如如下:
[root@localhost ~]# cat /etc/issue
centos release 5.5 (final)
kernel r on an m
3) 执行cat /etc/redhat-release ,例如如下:
[root@localhost ~]# cat /etc/redhat-release
centos release 5.5 (final)
查看系统是64位还是32位:
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 libs), 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