Debian install telnet service

Environment: Debian9.6 64-bit version

1. apt install xinetd telnetd telnet #Install xinet service, telnet service, telnet client

2. Create the file /etc/xinetd.d/telnet with the following contents:

service telnet
{
    disable = no
    flags           = REUSE
    socket_type     = stream
    wait            = no
    user            = root
    server          = /usr/sbin/in.telnetd
    server_args     = -h
    log_on_failure  += USERID
}

3. Restart the virtual machine