Shulou(Shulou.com)06/02 Report--

1. Install telnet

# yum-y install telnet

2. Detect the server port

# telnet 10.0.0.9 3306

Where 10.0.0.9 is the address of the server and 3306 is the port of the server.

After executing the above command, if a result similar to the following figure appears:

It indicates that the machine can communicate normally with 10.0.0.9, the port 3306 on 10.0.0.9 has been in a normal listening state, and the service corresponding to port 3306 has been started normally. (enter quit to exit telnet)

After executing the telnet command, if the following error is reported:

The reasons for reporting errors are as follows:

1. This machine cannot communicate with 10.0.0.9 normally.

2. The connection between this machine and port 3306 of 10.0.0.9 is blocked by its firewall.

3. Port 3306 on 10.0.0.9 is not listening, that is, the service corresponding to 3306 is not started normally.

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