http://glua.ua.pt/pub/ubuntu/
http://cesium.di.uminho.pt/pub/ubuntu-archive/
http://ftp.rnl.tecnico.ulisboa.pt/pub/ubuntu/archive/
https://mirror.leitecastro.com/ubuntu/
https://mirrors.ptisp.pt/ubuntu/
http://archive.ubuntumirror.dei.uc.pt/ubuntu/
http://mirrors.up.pt/ubuntu/
http://archive.ubuntu.com/ubuntu/