linux 下查看cpu位数 内核等参数命令
# 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
Red Hat Enterprise Linux AS release 4 (Nahant Update 5)
(查看当前操作系统发行版信息)
Ubuntu下：
1） cat /etc/issue
Ubuntu 12.04.2 LTS \n \l
2） lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 12.04.2 LTS
Release: 12.04
Codename: precise
# 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,内核,CPU,MEM,位数的相关命令
1.查看版本，内核
[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cpu,mem
[oracle@svr15 ~]$ grep "model name" /proc/cpuinfo
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
[oracle@svr15 ~]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
stepping : 6
cpu MHz : 1995.006
cache size : 64 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm pni monitor ds_cpl tm2 xtpr
bogomips : 3956.73
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Xeon(R) CPU 5130 @ 2.00GHz
stepping : 6
cpu MHz : 1995.006
cache size : 64 KB
physical id : 0
siblings : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm pni monitor ds_cpl tm2 xtpr
bogomips : 3981.31
3.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
[oracle@svr15 ~]$ ldd /sbin/mii-tool
libc.so.6 => /lib/i686/libc.so.6 (0x00b2f000)
/lib/ld-linux.so.2 (0x00a49000)
shell 脚本统计
通过shell脚本，获取 linux 系统名称、机器位数、cpu、内核数、内存等信息：
#!/bin/bash
hostname=`hostname`
ip_addr=`ifconfig | grep inet | grep Bcast | tr -s " "`
os_name=`cat /etc/issue | head -n1`
os_bit=`getconf LONG_BIT`
cpu=`cat /proc/cpuinfo | grep name | cut -f2 -d: | head -n1`
cpu_core=`cat /proc/cpuinfo | grep name | cut -f2 -d: | wc -l`
memory_kb=`cat /proc/meminfo | grep MemTotal | awk '{print $(NF-1)}'`
memory_mb=`expr $memory_kb / 1024`
memory_gb=`expr $memory_mb / 1024`
memory="$memory_gb GB; $memory_mb MB; $memory_kb KB"
memory_cmd='free -m'
echo "hostname : $hostname"
echo "ip_addr : $ip_addr"
echo
echo "os_name : $os_name"
echo "os_bit : $os_bit bit"
echo "cpu : $cpu"
echo "cpu_core : $cpu_core"
echo
echo "memory : $memory"
$memory_cmd
运行结果（ubuntu）：
homer@ubuntu:~/Desktop$ ./sysconfig.sh
hostname : ubuntu
ip_addr : inet addr:172.27.22.21 Bcast:172.27.22.255 Mask:255.255.255.0
os_name : Ubuntu 12.04.2 LTS \n \l
os_bit : 64 bit
cpu : Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz
cpu_core : 4
memory : 5 GB; 5967 MB; 6110792 KB
total used free shared buffers cached
Mem: 5967 5788 178 0 207 1903
-/+ buffers/cache: 3677 2289
Swap: 4092 0 4092
注： 此脚本在Ubuntu、CentOS、Redhat上测试通用