What are the functions of the Linux telnet command?

The telnet command in Linux is used to establish a telnet session with a remote host, having the following functionalities:

1. Remote login: The telnet command can be used to login to a remote host via the telnet protocol and execute commands.
2. Remote management is possible through the use of the telnet command, allowing for the management and configuration of remote hosts, such as modifying network settings or viewing system status.
3. Port scanning: The telnet command can be used to verify if a specific port on a remote host is open.
4. File transfer: The telnet command can be used to transfer files between a local host and a remote host using the telnet protocol.
5. Remote debugging: The telnet command can be used for remote debugging of programs, connecting to a remote host via telnet to check the program’s status and debug errors.

It is worth noting that because the telnet protocol does not encrypt data during transmission, using the telnet command is no longer recommended in today’s internet environment. Instead, it is recommended to use the more secure SSH protocol.