阿里云源

在文件 /etc/apt/source.list 添加

deb http://mirrors.aliyun.com/ubuntu trusty main restricteddeb-src http://mirrors.aliyun.com/ubuntu trusty main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://mirrors.aliyun.com/ubuntu trusty-updates main restricteddeb-src http://mirrors.aliyun.com/ubuntu trusty-updates main restricted## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team. Also, please note that software in universe WILL NOT receive any## review or updates from the Ubuntu security team.deb http://mirrors.aliyun.com/ubuntu trusty universedeb-src http://mirrors.aliyun.com/ubuntu trusty universedeb http://mirrors.aliyun.com/ubuntu trusty-updates universedeb-src http://mirrors.aliyun.com/ubuntu trusty-updates universe## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team, and may not be under a free licence. Please satisfy yourself as to## your rights to use the software. Also, please note that software in## multiverse WILL NOT receive any review or updates from the Ubuntu## security team.deb http://mirrors.aliyun.com/ubuntu trusty multiversedeb-src http://mirrors.aliyun.com/ubuntu trusty multiversedeb http://mirrors.aliyun.com/ubuntu trusty-updates multiversedeb-src http://mirrors.aliyun.com/ubuntu trusty-updates multiverse## N.B. software from this repository may not have been tested as## extensively as that contained in the main release, although it includes## newer versions of some applications which may provide useful features.## Also, please note that software in backports WILL NOT receive any review## or updates from the Ubuntu security team.deb http://mirrors.aliyun.com/ubuntu trusty-backports main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu trusty-backports main restricted universe multiversedeb http://security.ubuntu.com/ubuntu trusty-security main restricteddeb-src http://security.ubuntu.com/ubuntu trusty-security main restricteddeb http://security.ubuntu.com/ubuntu trusty-security universedeb-src http://security.ubuntu.com/ubuntu trusty-security universedeb http://security.ubuntu.com/ubuntu trusty-security multiversedeb-src http://security.ubuntu.com/ubuntu trusty-security multiverse

然后

sudo apt-get clean
sudo apt-get updatae

网易源

sudo add-apt-repository ‘deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse’