Telnet on Fedora

1.Install telnet server and telnet client
[root@localhost ~]# yum install telnetd telnet
2.start telnet
# chkconfig telnet on
3.To start telnet sevice
# /etc/init.d/xinetd restart
4.check if telnet is on
# chkconfig –list | grep telnet

Telnet on Ubuntu

1.install telnet on ubuntu
$ sudo apt-get install telnetd
2.start telnet
$ /etc/init.d/inetd restart