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  • mysql netstat

    netstat命令是一个监控TCP/IP网络的非常有用的工具,它可以显示路由表、实际的网络连接以及每一个网络接口设备的状态信息

    输出结果可以分为两个部分,一个是Active Internet connections,另一个是Active UNIX domain sockets.

    [root@DBSVR02 conf]# netstat
    Active Internet connections (w/o servers)
    Proto Recv-Q Send-Q Local Address               Foreign Address             State     
    tcp        0      0 168.168.80.9:ssh            168.168.80.1:22332          ESTABLISHED
    tcp        0      0 168.168.80.9:ssh            168.168.80.1:22864          ESTABLISHED
    Active UNIX domain sockets (w/o servers)
    Proto RefCnt Flags       Type       State         I-Node Path
    unix  12     [ ]         DGRAM                    11595  /dev/log
    unix  2      [ ]         DGRAM                    8807   @/org/kernel/udev/udevd
    unix  2      [ ]         DGRAM                    12403  @/org/freedesktop/hal/udev_event
    unix  3      [ ]         STREAM     CONNECTED     15684  /var/lib/mysql/mysql.sock
    unix  3      [ ]         STREAM     CONNECTED     15683 
    unix  2      [ ]         DGRAM                    14977 
    unix  2      [ ]         DGRAM                    14485 
    unix  2      [ ]         DGRAM                    13976 
    unix  3      [ ]         STREAM     CONNECTED     13438  /var/run/dbus/system_bus_socket
    unix  3      [ ]         STREAM     CONNECTED     13437 
    unix  2      [ ]         DGRAM                    13276 
    unix  2      [ ]         DGRAM                    13138 
    unix  2      [ ]         DGRAM                    13067 
    unix  3      [ ]         STREAM     CONNECTED     13051 
    unix  3      [ ]         STREAM     CONNECTED     13050 
    unix  3      [ ]         STREAM     CONNECTED     13047 
    unix  3      [ ]         STREAM     CONNECTED     13046 

    netstat 的常用参数: -t、-u、-w和 -x分别表示TCP、UDP、RAW和UNIX套接字连接。

    -a标记,还会显示出等待连接(也就是说处于监听模式)的套接字

    -l 显示正在被监听(listen)的端口。

     -n表示直接显示端口数字而不是通过察看/etc/service来转换为端口名

    -p选项表示列出监听的程序

    [root@DBSVR02 conf]# netstat -nat
    Active Internet connections (servers and established)
    Proto Recv-Q Send-Q Local Address               Foreign Address             State     
    tcp        0      0 0.0.0.0:50790               0.0.0.0:*                   LISTEN     
    tcp        0      0 0.0.0.0:111                 0.0.0.0:*                   LISTEN     
    tcp        0      0 0.0.0.0:22                  0.0.0.0:*                   LISTEN     
    tcp        0      0 127.0.0.1:631               0.0.0.0:*                   LISTEN     
    tcp        0      0 127.0.0.1:25                0.0.0.0:*                   LISTEN     
    tcp        0      0 168.168.80.9:22             168.168.80.1:22332          ESTABLISHED
    tcp        0      0 168.168.80.9:22             168.168.80.1:22864          ESTABLISHED
    tcp        0      0 :::42855                    :::*                        LISTEN     
    tcp        0      0 :::111                      :::*                        LISTEN     
    tcp        0      0 :::80                       :::*                        LISTEN     
    tcp        0      0 :::22                       :::*                        LISTEN     
    tcp        0      0 ::1:631                     :::*                        LISTEN     
    tcp        0      0 ::1:25                      :::*                        LISTEN     
    [root@DBSVR02 conf]#

    • 查看当前tcp监听端口

    [root@DBSVR02 conf]# netstat -tl
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address               Foreign Address             State     
    tcp        0      0 *:50790                     *:*                         LISTEN     
    tcp        0      0 *:sunrpc                    *:*                         LISTEN     
    tcp        0      0 *:ssh                       *:*                         LISTEN     
    tcp        0      0 localhost:ipp               *:*                         LISTEN     
    tcp        0      0 localhost:smtp              *:*                         LISTEN     
    tcp        0      0 *:42855                     *:*                         LISTEN     
    tcp        0      0 *:sunrpc                    *:*                         LISTEN     
    tcp        0      0 *:http                      *:*                         LISTEN     
    tcp        0      0 *:ssh                       *:*                         LISTEN     
    tcp        0      0 localhost:ipp               *:*                         LISTEN     
    tcp        0      0 localhost:smtp              *:*                         LISTEN     
    [root@DBSVR02 conf]#

    •  查看当前tcp监听端口, 需要显示监听的程序名,当不清楚mysql的监听端口时比较好用

    [root@DBSVR02 conf]# netstat -tlp
    Active Internet connections (only servers)
    Proto Recv-Q Send-Q Local Address               Foreign Address             State       PID/Program name  
    tcp        0      0 *:50790                     *:*                         LISTEN      1216/rpc.statd     
    tcp        0      0 *:sunrpc                    *:*                         LISTEN      1197/rpcbind       
    tcp        0      0 *:ssh                       *:*                         LISTEN      1474/sshd          
    tcp        0      0 localhost:ipp               *:*                         LISTEN      1360/cupsd         
    tcp        0      0 localhost:smtp              *:*                         LISTEN      1550/master        
    tcp        0      0 *:42855                     *:*                         LISTEN      1216/rpc.statd     
    tcp        0      0 *:sunrpc                    *:*                         LISTEN      1197/rpcbind       
    tcp        0      0 *:http                      *:*                         LISTEN      1590/httpd         
    tcp        0      0 *:ssh                       *:*                         LISTEN      1474/sshd          
    tcp        0      0 localhost:ipp               *:*                         LISTEN      1360/cupsd         
    tcp        0      0 localhost:smtp              *:*                         LISTEN      1550/master        
    [root@DBSVR02 conf]#

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  • 原文地址:https://www.cnblogs.com/simhare/p/3053534.html
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