# uname -a

 Linux euis1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux

 (查看当前操作系统内核信息)

 # cat /etc/issue | grep Linux

 Red Hat Enterprise Linux AS release 4 (Nahant Update 5)

 (查看当前操作系统发行版信息)

 # cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

       8  Intel(R) Xeon(R) CPU            E5410   @ 2.33GHz

 (看到有8个逻辑CPU, 也知道了CPU型号) 

 # cat /proc/cpuinfo | grep physical | uniq -c

       4 physical id      : 0

       4 physical id      : 1

 (说明实际上是两颗4核的CPU) 

 # getconf LONG_BIT

 32

 (说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit)

 # cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l

 8

 (结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)

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 查看linux系统版本,位数的相关命令

 1.查看内核版本

 [oracle@svr15 ~]$ cat /etc/issue

 Red Hat Enterprise Linux AS release 4 (Nahant)

 Kernel /r on an /m

 [oracle@svr15 ~]$ cat /proc/version

 Linux version 2.6.9-5.ELsmp (bhcompile@decompose.build.redhat.com) (gcc version 3.4.3 20041212 (Red Hat 3.4.3-9.EL4)) #1 SMP Wed Jan 5 19:30:39 EST 2005

 [oracle@svr15 ~]$ uname -r

 2.6.9-5.ELsmp

 2.查看操作系统位数

 [oracle@svr15 ~]$ ls /   #如果有lib64或这个目录,那操作系统就是64位的

 bin boot dev etc home initrd lib lost+found media misc mnt opt proc root sbin selinux srv sys tmp usr var

 [oracle@svr15 ~]$ getconf LONG_BIT

 32