What is the ping port command in Linux?

In Linux, the ping port command is the "telnet" command. The telnet command is a tool used to establish a connection to a specified port on a remote host. An example is: "telnet < "Target Port>", where is the IP address or domain name of the host you want to ping, and is the port number you want to ping.

Operating system for this tutorial: Linux5.18.14 system, Dell G3 computer.

In Linux, you can use the telnet command to simulate pinging a specific port. The telnet command is a tool used to establish a connection to a specified port on a remote host. You can then check the port's reachability by trying to establish a connection to the target host's port.

The following is an example of port ping using the telnet command:

telnet <目标主机> <目标端口>

Where, is the IP address or domain name of the host you want to ping, < target port > is the port number you want to ping.

For example, if you want to ping port number 80 (HTTP port) of the target host example.com, you can run the following command:

telnet example.com 80

If the port is reachable, you will see a message similar to Output of the following message:

Trying xxx.xxx.xxx.xxx...
Connected to example.com.
Escape character is '^]'.

This indicates that your computer was able to successfully connect to the specified port on the target host. If the port is unreachable, you will see a connection failed error message.

Please note that some Linux distributions may not have the telnet command installed by default. You can use the package manager to install telnet. For example, on Ubuntu, you can run the following command to install:

sudo apt-get install telnet

Sometimes you can also use the nc command (netcat) for port detection, which is similar to the telnet command. The following is an example of port ping using the nc command:

nc -zv <目标主机> <目标端口>

For example:

nc -zv example.com 80

Whether you are using telnet or nc, you can use these commands to test whether a specific port on the target host is available Da.

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