https://mirror.coganng.com/ubuntu-ports/
https://mirror.coganng.com/ubuntu/
http://0ms.dev/mirrors/ubuntu/
http://download.nus.edu.sg/mirror/ubuntu/
http://mirror.aktkn.sg/ubuntu/
http://mirror.sg.gs/ubuntu/
http://kambing.uu.sg/ubuntu/
http://ossmirror.mycloud.services/os/linux/ubuntu/
http://archive.ubuntu.com/ubuntu/