linux下查看内核、操作系统、发行版本、系统信息、运行位数

1.uname -a 查看系统内核信息

[hadoop@localhost ~]$ uname -a 
    Linux localhost.localdomain 2.6.32-358.el6.i686 #1 SMP Thu Feb 21 21:50:49 UTC 2013 i686 i686 i386 GNU/Linux

2.cat /proc/version 查看当前操作系统版本信息

[hadoop@localhost ~]$ cat /proc/version
    Linux version 2.6.32-358.el6.i686 (mockbuild@c6b8.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-3) (GCC) ) #1 SMP Thu Feb 21 21:50:49 UTC 2013

3.cat /etc/issue | cat /etc/redhat-release 查看发行版本信息

[hadoop@localhost ~]$ cat /etc/issue
    CentOS release 6.4 (Final)
    Kernel \r on an \m
[hadoop@localhost ~]$ cat /etc/redhat-release
    CentOS release 6.4 (Final)

4.cat /proc/cpuinfo 查看cpu相关信息，包括型号、主频、内核信息等

[hadoop@localhost ~]$ cat /proc/cpuinfo
    processor       : 0
    vendor_id       : GenuineIntel
    cpu family      : 6
    model           : 69
    model name      : Intel(R) Core(TM) i7-4650U CPU @ 1.70GHz
    stepping        : 1
    cpu MHz         : 2294.719
    cache size      : 4096 KB
    fdiv_bug        : no
    hlt_bug         : no
    f00f_bug        : no
    coma_bug        : no
    fpu             : yes
    fpu_exception   : yes
    cpuid level     : 13
    wp              : yes
    flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss nx pdpe1gb rdtscp lm constant_tsc up arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm ida arat epb pln pts dts fsgsbase smep
    bogomips        : 4589.43
    clflush size    : 64
    cache_alignment : 64
    address sizes   : 40 bits physical, 48 bits virtual
    power management:

5.getconf LONG_BIT 查看系统当前运行的模式(这里返回32说明运行在32bit模式下 )， 但不代表CPU不支持64bit

[hadoop@localhost ~]$ getconf LONG_BIT
    32