%x{curl www.site.com/ | grep -o http://[A-Za-z0-9_.:/]*.jpg >> links}
%x{curl www.site.com/ | grep -o https://[A-Za-z0-9_.:/]*.jpg >> links}

for i in 2..3 do
        %x{curl www.site.com/page/#i | grep -o http://[A-Za-z0-9_.:/]*.jpg >> links}
        %x{curl www.site.com/page/#i | grep -o https://[A-Za-z0-9_.:/]*.jpg >> links}
end

IO.foreach('links') do |line|
        %x{curl -O #{line}}
end