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。

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 (builder@kbuilder.dev.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-11) (GCC) ) #1 SMP Tue Jul 4 15:04:05 UTC 2017

系统发行版本

cat /etc/centos-release

CentOS Linux release 7.3.1611 (Core)

这里是centos7.3

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

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

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

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