ftp://ftp.dei.uc.pt/pub/linux/  direct

[DIR]xubuntu/  direct  102 twin directories
[DIR]ubuntu/  direct  634+ twin directories
[DIR]kernel/  direct  65535+ twin directories
[DIR]gentoo/  direct  2190+ twin directories
[DIR]CentOS/  direct  2070+ twin directories
[DIR]fedora/  direct  5109+ twin directories