小喵 🐈 says to YSITD
$ cat /etc/apt/sources.list deb http://tw.archive.ubuntu.com/ubuntu/ trusty main restricted deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty main restricted deb http://tw.archive.ubuntu.com/ubuntu/ trusty-updates main restricted deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty-updates main restricted deb http://tw.archive.ubuntu.com/ubuntu/ trusty universe deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty universe deb http://tw.archive.ubuntu.com/ubuntu/ trusty-updates universe deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty-updates universe deb http://tw.archive.ubuntu.com/ubuntu/ trusty multiverse deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty multiverse deb http://tw.archive.ubuntu.com/ubuntu/ trusty-updates multiverse deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty-updates multiverse deb http://tw.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse deb-src http://tw.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse deb http://security.ubuntu.com/ubuntu trusty-security main restricted deb-src http://security.ubuntu.com/ubuntu trusty-security main restricted deb http://security.ubuntu.com/ubuntu trusty-security universe deb-src http://security.ubuntu.com/ubuntu trusty-security universe deb http://security.ubuntu.com/ubuntu trusty-security multiverse deb-src http://security.ubuntu.com/ubuntu trusty-security multiverse # deb http://archive.canonical.com/ubuntu trusty partner # deb-src http://archive.canonical.com/ubuntu trusty partner # deb http://extras.ubuntu.com/ubuntu trusty main # deb-src http://extras.ubuntu.com/ubuntu trusty main