/etc/apt/sources.list
## EOL upgrade sources.list
# required
deb http://old-releases.ubuntu.com/ubuntu/ precise main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ precise-updates main restricted universe multiverse
deb http://old-releases.ubuntu.com/ubuntu/ precise-security main restricted universe multiverse
# Optional
#deb http://old-releases.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse
sudo sed -i -re 's/([a-z]{2}\.)?archive.ubuntu.com|security.ubuntu.com/old-releases.ubuntu.com/g' /etc/apt/sources.list
sudo sed -i -re ‘s/([a-z]{2}.)?archive.ubuntu.com|security.ubuntu.com/mirrors.aliyun.com/oldubuntu-releases/
