配置Ubuntu Server高速apt-get源

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今天刚装上Ubuntu Server 12，默认的apt-get源比较慢。更改一下源地址。

方法：

1、修改源地址：cp /etc/apt/sources.list /etc/apt/sources.list.bak vim /etc/apt/sources.list

加入如下内容（中科大的）：
deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates main restricted deb http://mirrors.ustc.edu.cn/ubuntu/ precise universe deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise universe deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universe deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates universe deb http://mirrors.ustc.edu.cn/ubuntu/ precise multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise multiverse deb http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-updates multiverse deb http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse deb-src http://mirrors.ustc.edu.cn/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricted deb-src http://security.ubuntu.com/ubuntu precise-security main restricted deb http://security.ubuntu.com/ubuntu precise-security universe deb-src http://security.ubuntu.com/ubuntu precise-security universe deb http://security.ubuntu.com/ubuntu precise-security multiverse deb-src http://security.ubuntu.com/ubuntu precise-security multiverse

比较快的源：

搜狐源：deb http://mirrors.sohu.com/ubuntu/ precise-updates main restricted deb-src http://mirrors.sohu.com/ubuntu/ precise-updates main restricted deb http://mirrors.sohu.com/ubuntu/ precise universe deb-src http://mirrors.sohu.com/ubuntu/ precise universe deb http://mirrors.sohu.com/ubuntu/ precise-updates universe deb-src http://mirrors.sohu.com/ubuntu/ precise-updates universe deb http://mirrors.sohu.com/ubuntu/ precise multiverse deb-src http://mirrors.sohu.com/ubuntu/ precise multiverse deb http://mirrors.sohu.com/ubuntu/ precise-updates multiverse deb-src http://mirrors.sohu.com/ubuntu/ precise-updates multiverse deb http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse deb-src http://mirrors.sohu.com/ubuntu/ precise-backports main restricted universe multiverse

网易源：
deb http://mirrors.163.com/ubuntu/ precise-updates main restricted deb-src http://mirrors.163.com/ubuntu/ precise-updates main restricted deb http://mirrors.163.com/ubuntu/ precise universe deb-src http://mirrors.163.com/ubuntu/ precise universe deb http://mirrors.163.com/ubuntu/ precise-updates universe deb-src http://mirrors.163.com/ubuntu/ precise-updates universe deb http://mirrors.163.com/ubuntu/ precise multiverse deb-src http://mirrors.163.com/ubuntu/ precise multiverse deb http://mirrors.163.com/ubuntu/ precise-updates multiverse deb-src http://mirrors.163.com/ubuntu/ precise-updates multiverse deb http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse deb-src http://mirrors.163.com/ubuntu/ precise-backports main restricted universe multiverse

更新看看速度：
sudo apt-get update sudo apt-get upgrade

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动态 MMap 没有空间了请增大APT::Cache-Limit 的大小

ubuntu 软件源的source list中如果选择了太多的软件源的话可能导致如下错误： “动态 MMap 没有空间了。

请增大APT::Cache-Limit 的大小” 解决方案：编辑 sudo gedit /etc/apt/apt.conf（如果没有apt.conf这个文件就新建一个）

在里面增加或者修改以下参数，把后面的数字尽量的调大即可，如果调大后重复出现该问题，

继续增加数字即可 APT::Cache-Limit 99999999;