deb
- deb http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ utopic-security main restricted universe multiverse
- deb
- deb
- deb
- deb-src
- deb-src http://mirrors.ustc.edu.cn/ubuntu-old-releases/ubuntu/ utopic-security main restricted universe multiverse
- deb-src
- deb-src
- deb-src