查看Linux系统信息

查看Linux系统信息的命令

Linux查看系统的一些关于内核，cpu，内存，硬盘信息的命令，这里使用的是阿里云的Centos7.3的系统。

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查看内核信息

• uname -a

  Linux izbp1chqvj8ehrcdu67uvtz 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
  

  • uname -s (内核名字)

    Linux

  • uname -r （内核发行版本）

    3.10.0-514.26.2.el7.x86_64

  • uanme -p (处理器架构)

    x86_64

  • uanme -o (操作系统)

    GNU/Linux

• cat /proc/version

  Linux version 3.10.0-514.26.2.el7.x86_64 ([email protected]) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Jul 4 15:04:05 UTC 2017
  

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系统发行版本

• cat /etc/centos-release

  CentOS Linux release 7.3.1611 (Core)

  这里是centos7.3

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cpu相关

• lscpu

  Architecture:          x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Byte Order:            Little Endian
  CPU(s):                1
  On-line CPU(s) list:   0
  Thread(s) per core:    1
  Core(s) per socket:    1
  

• cat /proc/cpuinfo

  processor : 0
  vendor_id : GenuineIntel
  cpu family    : 6
  model     : 79
  model name    : Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz
  stepping  : 1
  microcode : 0x1
  cpu MHz       : 2494.222
  

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内存相关

• lsmem

  RANGE                                  SIZE  STATE REMOVABLE BLOCK
  0x0000000000000000-0x000000004fffffff  1.3G online        否   0-9
  0x0000000050000000-0x0000000057ffffff  128M online        是    10
  0x0000000058000000-0x000000007fffffff  640M online        否 11-15
  
  Memory block size:       128M
  Total online memory:       2G
  Total offline memory:      0B
  [zhubin@izbp1chqvj8ehrcdu67uvtz ~]$ lsmem
  RANGE                                  SIZE  STATE REMOVABLE BLOCK
  0x0000000000000000-0x000000004fffffff  1.3G online        否   0-9
  0x0000000050000000-0x0000000057ffffff  128M online        是    10
  0x0000000058000000-0x000000007fffffff  640M online        否 11-15
  
  Memory block size:       128M
  Total online memory:       2G
  Total offline memory:      0B
  

• cat /proc/meminfo

  MemTotal:        1883724 kB
  MemFree:          897868 kB
  MemAvailable:    1500748 kB
  Buffers:           86424 kB
  Cached:           605984 kB
  SwapCached:            0 kB
  Active:           400164 kB
  Inactive:         445816 kB
  Active(anon):     153768 kB
  Inactive(anon):      128 kB
  Active(file):     246396 kB
  Inactive(file):   445688 kB
  Unevictable:           0 kB
  

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硬盘相关

• fdisk -l

  查看当前的磁盘分区信息(主要是分区表信息)

• df -h

  查看当前文件系统信息，包括容量大小、使用情况、挂载点等

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实时查看

• top

  显示当前系统cpu，内存的利用率

  top - 16:59:29 up 6 days, 29 min,  2 users,  load average: 0.00, 0.01, 0.05
  Tasks:  81 total,   1 running,  66 sleeping,  14 stopped,   0 zombie
  %Cpu(s):  0.4 us,  0.2 sy,  0.5 ni, 98.8 id,  0.1 wa,  0.0 hi,  0.0 si,  0.0 st
  KiB Mem :  1883724 total,   891816 free,   198964 used,   792944 buff/cache
  KiB Swap:        0 total,        0 free,        0 used.  1500404 avail Mem 
  
    PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND     
      1 root      20   0   43104   2520   1428 S  0.0  0.1   0:05.38 systemd     
      2 root      20   0       0      0      0 S  0.0  0.0   0:00.01 kthreadd    
      3 root      20   0       0      0      0 S  0.0  0.0   0:01.41 ksoftirqd/0 
      5 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kworker/0:0H
      7 root      rt   0       0      0      0 S  0.0  0.0   0:00.00 migration/0 
      8 root      20   0       0      0      0 S  0.0  0.0   0:00.00 rcu_bh      
      9 root      20   0       0      0      0 S  0.0  0.0   0:24.94 rcu_sched   
     10 root      rt   0       0      0      0 S  0.0  0.0   0:02.07 watchdog/0  
     12 root      20   0       0      0      0 S  0.0  0.0   0:00.00 kdevtmpfs   
     13 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 netns       
     14 root      20   0       0      0      0 S  0.0  0.0   0:00.08 khungtaskd  
     15 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 writeback   
     16 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 kintegrityd 
     17 root       0 -20       0      0      0 S  0.0  0.0   0:00.00 bioset