SUIMASEN ! MAIL de ONEGAI

To run a command as administrator (user "root"), use "sudo <command>".
See "man sudo_root" for details.

lubuntu@lubuntu:~$ sudo perl -pi.bak -e 's;http[^ ]+;http://ftp.jaist.ac.jp/pub/Linux/ubuntu;' /etc/apt/sources.list
lubuntu@lubuntu:~$