ubuntu14.04更新源

1.刚换的ubuntu14.04，建议替换原有的源，163的源个人认为还是比较给力的，这里只给出163的源

sudo/etc/apt/source.list

替换为：
debhttp://mirrors.163.com/ubuntu/ trusty main restricted universemultiverse

debhttp://mirrors.163.com/ubuntu/ trusty-security main restricteduniverse multiverse

debhttp://mirrors.163.com/ubuntu/ trusty-updates main restricteduniverse multiverse

debhttp://mirrors.163.com/ubuntu/ trusty-proposed main restricteduniverse multiverse

debhttp://mirrors.163.com/ubuntu/ trusty-backports main restricteduniverse multiverse

deb-srchttp://mirrors.163.com/ubuntu/ trusty main restricted universemultiverse

deb-srchttp://mirrors.163.com/ubuntu/ trusty-security main restricteduniverse multiverse

deb-srchttp://mirrors.163.com/ubuntu/ trusty-updates main restricteduniverse multiverse

deb-srchttp://mirrors.163.com/ubuntu/ trusty-proposed main restricteduniverse multiverse

deb-srchttp://mirrors.163.com/ubuntu/ trusty-backports main restricteduniverse multiverse

注意：这里源是trusty源，不是别的

2.更换服务器
找到设置->软件和更新



点击下载自，更换服务器



选择163服务器或者最佳服务器