linux 下查看cpu位数 内核等参数命令

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 | 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,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

processor : 2
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 : 3
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

processor : 3
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 : 3
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

[oracle@svr15 ~]$ grep MemTotal /proc/meminfo
MemTotal: 4147280 kB

[oracle@svr15 ~]$ free
total used free shared buffers cached
Mem: 4147280 4138220 9060 0 106124 3865896
-/+ buffers/cache: 166200 3981080
Swap: 4192924 0 4192924

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)