如题，打开软件中心的时候抛出这个异常。
以下软件源访问过慢或者暂时无法访问:
http://cn.archive.ubuntu.com/ubuntu/dists/artful/main
http://cn.archive.ubuntu.com/ubuntu/dists/artful-updates/main
http://cn.archive.ubuntu.com/ubuntu/dists/artful/universe
http://cn.archive.ubuntu.com/ubuntu/dists/artful-updates/universe
http://cn.archive.ubuntu.com/ubuntu/dists/artful/multiverse
http://cn.archive.ubuntu.com/ubuntu/dists/artful-updates/multiverse
http://cn.archive.ubuntu.com/ubuntu/dists/artful-backports/main
咋整？
更换，对应你发行版本的源，
目前国内对应1710的软件源还比较少，查看下你系统版本，终端执行：cat /etc/issue
显示：Ubuntu 17.10 \n \l，则替换为以下软件源
deb http://mirrors.163.com/ubuntu/ artful main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ artful-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ artful-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ artful-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ artful-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ artful main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ artful-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ artful-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ artful-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ artful-backports main restricted universe multiverse
