LINUX监控一：监控命令

[root@node1 ~]# vmstat 2 3
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa st
 1  0      0 632736  95324 108892    0    0     2     6  154  428  0  0 99  0  0
 0  0      0 632712  95324 108892    0    0     0     0  144  491  1  0 99  0  0
 0  0      0 632712  95324 108892    0    0     0    26  148  496  1  1 99  0  0

[root@node1 ~]# vmstat --help
usage: vmstat [-V] [-n] [delay [count]]
              -V prints version.                        
              -n causes the headers not to be reprinted regularly. 
              -a print inactive/active page stats.  打印活动/不活动的页状态
              -d prints disk statistics  打印磁盘情况
              -D prints disk table  打印磁盘信息
              -p prints disk partition statistics 打印磁盘分区信息
              -s prints vm table 打印vm表
              -m prints slabinfo  slablinfo信息
              -t add timestamp to output
              -S unit size
              delay is the delay between updates in seconds. 
              unit size k:1000 K:1024 m:1000000 M:1048576 (default is K)
              count is the number of updates.

[root@node1 ~]# ps --help
********* simple selection *********  ********* selection by list *********
-A all processes                      -C by command name
-N negate selection                   -G by real group ID (supports names)
-a all w/ tty except session leaders  -U by real user ID (supports names)
-d all except session leaders         -g by session OR by effective group name
-e all processes                      -p by process ID
T  all processes on this terminal     -s processes in the sessions given
a  all w/ tty, including other users  -t by tty
g  OBSOLETE -- DO NOT USE             -u by effective user ID (supports names)
r  only running processes             U  processes for specified users
x  processes w/o controlling ttys     t  by tty
*********** output format **********  *********** long options ***********
-o,o user-defined  -f full            --Group --User --pid --cols --ppid
-j,j job control   s  signal          --group --user --sid --rows --info
-O,O preloaded -o  v  virtual memory  --cumulative --format --deselect
-l,l long          u  user-oriented   --sort --tty --forest --version
-F   extra full    X  registers       --heading --no-heading --context
                    ********* misc options *********
-V,V  show version      L  list format codes  f  ASCII art forest
-m,m,-L,-T,H  threads   S  children in sum    -y change -l format
-M,Z  security data     c  true command name  -c scheduling class
-w,w  wide output       n  numeric WCHAN,UID  -H process hierarchy

[root@node1 ~]# iostat 2 2
Linux 2.6.32-358.el6.x86_64 (node1)     12/28/2015      _x86_64_        (1 CPU)
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.41    0.00    0.35    0.04    0.00   99.20
Device:            tps   Blk_read/s   Blk_wrtn/s   Blk_read   Blk_wrtn
scd0              0.00         0.00         0.00        288          0
sda               0.72         4.56        13.94     357190    1092500
dm-0              1.98         4.44        13.94     347810    1092448
dm-1              0.00         0.03         0.00       2376          0

[root@node1 ~]# iostat -x
Linux 2.6.32-358.el6.x86_64 (node1)     12/28/2015      _x86_64_        (1 CPU)
avg-cpu:  %user   %nice %system %iowait  %steal   %idle
           0.40    0.00    0.35    0.04    0.00   99.20
Device:         rrqm/s   wrqm/s     r/s     w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await  svctm  %util
scd0              0.00     0.00    0.00    0.00     0.00     0.00     8.00     0.00   11.19  11.19   0.00
sda               0.19     1.09    0.07    0.65     4.49    13.95    25.49     0.00    2.58   1.72   0.12
dm-0              0.00     0.00    0.24    1.74     4.38    13.95     9.25     0.01    3.53   0.62   0.12
dm-1              0.00     0.00    0.00    0.00     0.03     0.00     8.00     0.00    4.53   1.39   0.00

[root@node1 ~]# free
             total       used       free     shared    buffers     cached
Mem:       1012552     463420     549132          0     100304     179744
-/+ buffers/cache:     183372     829180
Swap:      2031608          0    2031608

[root@node1 ~]# netstat -a
Active Internet connections (servers and established)    网络连接(TCP)
Proto Recv-Q Send-Q Local Address               Foreign Address             State      
tcp        0      0 *:28017                     *:*                         LISTEN      
tcp        0      0 *:ssh                       *:*                         LISTEN      
tcp        0      0 localhost:smtp              *:*                         LISTEN      
tcp        0      0 *:27017                     *:*                         LISTEN      
tcp        0      0 localhost:ssh               192.168.75.1:49742          ESTABLISHED 
tcp        0      1 localhost:46531             localhost:27017             SYN_SENT    
tcp        0      1 localhost:35646             192.168.75.12:27017         SYN_SENT    
tcp        0      0 localhost:ssh               192.168.75.1:58264          ESTABLISHED 
tcp        0      0 *:ssh                       *:*                         LISTEN      
tcp        0      0 localhost:smtp              *:*                         LISTEN      
Active UNIX domain sockets (servers and established)      本地UNIX套接字
Proto RefCnt Flags       Type       State         I-Node Path
unix  2      [ ACC ]     STREAM     LISTENING     24929  /tmp/mongodb-27017.sock
unix  2      [ ACC ]     STREAM     LISTENING     8691   @/com/ubuntu/upstart
unix  2      [ ACC ]     STREAM     LISTENING     11532  public/cleanup
unix  2      [ ACC ]     STREAM     LISTENING     11539  private/tlsmgr