Allowing Root Logins to Telnet and FTP Services

只要編輯/etc/securetty即可
加入以下就可以讓10個session以root telnet登入
pts/0
pts/1
pts/2
pts/3
pts/4
pts/5
pts/6
pts/7
pts/8
pts/9

Ref: http://www.idevelopment.info/data/Unix/Linux/LINUX_TelnetFTPAsRoot.shtml