Finally I find the problem is User-Agent string in apt-get. see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=355782
** Bug watch added: Debian Bug tracker #355782 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=355782 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1613193 Title: apt-get does't work with http_proxy To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/1613193/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
