1.Install telnet use this command in terminal(Applications/Accessories/Terminal): stephen@stephen-LifeBook-S7110:~$ sudo apt-get install xinetd telnetd [sudo] password for stephen: Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: telnetd xinetd 0 to upgrade, 2 to newly install, 0 to remove and 0 not to upgrade...