查看centos内核的版本：
1)[root@localhost ~]# cat /proc/version
Linux version 2.6.32-279.el6.i686 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.6 20120305 (Red Hat 4.4.6-4) (GCC) ) #1 SMP Fri Jun 22 10:59:55 UTC 2012
2)
[root@localhost ~]# uname -a
Linux bogon 2.6.32-279.el6.i686 #1 SMP Fri Jun 22 10:59:55 UTC 2012 i686 i686 i386 GNU/Linux
3)
[root@localhost ~]# uname -r
2.6.32-279.el6.i686
2. 查看linux版本：
1) 列出所有版本信息,
[root@localhost ~]# lsb_release -a
LSB Version: :core-4.0-ia32:core-4.0-noarch:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-ia32:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.3 (Final)
Release: 6.3
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 6.3 (Final)
Kernel \r on an \m
查看系统是64位还是32位:
1、getconf LONG_BIT or getconf WORD_BIT 亲测两个都可以！
[root@localhost ~]# getconf LONG_BIT
32
2、file /bin/ls
[root@localhost ~]# file /bin/ls
/bin/ls: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.18, stripped
初学只是做个笔记，敲了一遍，都出来了。这是我pc上的centos。。。。。。。。。。。
