+for url in $((curl -s https://launchpad.net/ubuntu/+archivemirrors | \
+ grep -P -B8 "statusUP|statusSIX" | \
+ grep -o -P "(f|ht)tp.*\"" | \
+ sed 's/"$//' | sort | uniq; \
+ curl -s http://mirrors.ubuntu.com/mirrors.txt | sort | uniq) | \
+ sort | uniq -d)