ubuntu的源更改

刚才想安装mysql的时候，输入命令：sudo install apt-get mysql-server，但是一直不成功，试了一下apt-get update但还是不行，于是想到更换源，在网上找了资料。地址：http://blog.oobeta.com/archives/2012/04/26/2355.html

1、首先对源进行备份

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup

2、修改编辑源

sudo gedit /etc/apt/sources.list

我使用的是网易源

#网易源（速度很快）
deb precise main universe restricted multiverse
deb-src precise main universe restricted multiverse
deb precise-security universe main multiverse restricted
deb-src precise-security universe main multiverse restricted
deb precise-updates universe main multiverse restricted
deb precise-proposed universe main multiverse restricted
deb-src precise-proposed universe main multiverse restricted
deb precise-backports universe main multiverse restricted
deb-src precise-backports universe main multiverse restricted
deb-src precise-updates universe main multiverse restricted

把sources.list的内容全部改成这

3、保存后执行一下命令
sudo apt-get update
sudo apt-get upgrade