Ubuntu安装telnet与ssh服务器

1. Install telnet server

$ sudo apt-get install telnetd
$ sudo /etc/init.d/openbsd-inetd restart

2. Install openssh server

$ sudo apt-get install openssh-server
$ sudo /etc/init.d/ssh restart

Reference

1. http://www.cyberciti.biz/faq/ubuntu-linux-enable-telnet-service/
2. http://www.cyberciti.biz/faq/ubuntu-linux-openssh-server-installation-and-configuration/