[Linux][Ubuntu] Telnet Server 설치

$ sudo apt-get install xinetd
$ sudo apt-get install telnetd

$ sudo vi /etc/xinetd.conf

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

$ sudo /etc/init.d/xinetd restart