查看centos内核的版本：    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 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