Find the fastest Ubuntu repository

wget http://ftp.us.debian.org/debian/pool/main/n/netselect/netselect_0.3.ds1-30_amd64.deb
sudo dpkg -i netselect_0.3.ds1-29_amd64.deb

netselect -s 20 -t 40 $(wget -qO - mirrors.ubuntu.com/mirrors.txt)