UBUNTU 15.04 apt-get update失败

scrin

应该还是源不行，换清华的源试试，我都是用的清华的源
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-updates main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-updates main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-security main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-security main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-backports main restricted universe multiverse
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid-backports main restricted universe multiverse
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid main universe restricted
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports/ vivid main universe restricted

deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-updates main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-updates main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-security main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-security main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-backports main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid main universe restricted
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ vivid main universe restricted