Linux 关键信息查看(内存,硬盘,网络,CPU)

查看内存总体使用状况：

Shell代码

1. XXXX@XXXXXXXX:~$ free -m   
2.              total       used       free     shared    buffers     cached   
3. Mem:          1517        848        669          0         36        410  
4. -/+ buffers/cache:        401       1116  
5. Swap:            0          0          0  
6. XXXX@XXXXXXXX:~$ free   
7.              total       used       free     shared    buffers     cached   
8. Mem:       1554088     868768     685320          0      37500     420784  
9. -/+ buffers/cache:     410484    1143604  
10. Swap:            0          0          0  

XXXX@XXXXXXXX:~$ free -m
             total       used       free     shared    buffers    
cached
Mem:          1517        848        669          0         36     
  410
-/+ buffers/cache:        401       1116
Swap:            0          0          0
XXXX@XXXXXXXX:~$ free
             total       used       free     shared    buffers    
cached
Mem:       1554088     868768     685320          0      37500    
420784
-/+ buffers/cache:     410484    1143604
Swap:            0          0          0

 查看单个进程内存使用状况：

Shell代码

1. XXXX@XXXXXXXX:~$ ps aux   
2. USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND   
3. root         1  0.0  0.1   2844  1688 ?        Ss   15:14   0:01 /sbin/init   
4. ......  

XXXX@XXXXXXXX:~$ ps aux
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME
COMMAND
root         1  0.0  0.1   2844  1688 ?        Ss   15:14   0:01
/sbin/init
......

 查看内存详细信息：

Shell代码

1. XXXX@XXXXXXXX:~$ more /proc/meminfo    
2. MemTotal:      1554088 kB   
3. MemFree:        681264 kB   
4. Buffers:         38232 kB   
5. Cached:         422212 kB   
6. SwapCached:          0 kB   
7. Active:         515496 kB   
8. Inactive:       301408 kB   
9. HighTotal:      653888 kB   
10. HighFree:         1064 kB   
11. LowTotal:       900200 kB   
12. LowFree:        680200 kB   
13. SwapTotal:           0 kB   
14. SwapFree:            0 kB   
15. Dirty:               0 kB   
16. Writeback:           0 kB   
17. AnonPages:      356560 kB   
18. Mapped:          71532 kB   
19. Slab:            24132 kB   
20. SReclaimable:    15080 kB   
21. SUnreclaim:       9052 kB   
22. PageTables:       2024 kB   
23. NFS_Unstable:        0 kB   
24. Bounce:              0 kB   
25. CommitLimit:    777044 kB   
26. Committed_AS:   821772 kB   
27. VmallocTotal:   114680 kB   
28. VmallocUsed:     53584 kB   
29. VmallocChunk:    59380 kB  

XXXX@XXXXXXXX:~$ more /proc/meminfo 
MemTotal:      1554088 kB
MemFree:        681264 kB
Buffers:         38232 kB
Cached:         422212 kB
SwapCached:          0 kB
Active:         515496 kB
Inactive:       301408 kB
HighTotal:      653888 kB
HighFree:         1064 kB
LowTotal:       900200 kB
LowFree:        680200 kB
SwapTotal:           0 kB
SwapFree:            0 kB
Dirty:               0 kB
Writeback:           0 kB
AnonPages:      356560 kB
Mapped:          71532 kB
Slab:            24132 kB
SReclaimable:    15080 kB
SUnreclaim:       9052 kB
PageTables:       2024 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:    777044 kB
Committed_AS:   821772 kB
VmallocTotal:   114680 kB
VmallocUsed:     53584 kB
VmallocChunk:    59380 kB

查看硬盘详细信息： more /proc/diskstats

查看文件大小：du -sh

查看分区使用: df -lh

查看网络总体信息：ifconfig

查看实际流量：sudo iftop

查看CPU详细信息：more /proc/cpuinfo