linux更换源

1、ubuntu 更换源

以ubuntu16.04为例

（1）cp /etc/apt/sources.list /etc/apt/sources.list.bak           //备份系统原有的源

（2）vi /etc/apt/sources.list       //将文件内容改为如下对应需要的源的内容

阿里源：

# deb cdrom:[Ubuntu 16.04 LTS _Xenial Xerus_ - Release amd64 (20160420.1)]/ xenial main restricteddeb-src http://archive.ubuntu.com/ubuntu xenial main restricted #Added by software-propertiesdeb http://mirrors.aliyun.com/ubuntu/ xenial main restricteddeb-src http://mirrors.aliyun.com/ubuntu/ xenial main restricted multiverse universe #Added by software-propertiesdeb http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricteddeb-src http://mirrors.aliyun.com/ubuntu/ xenial-updates main restricted multiverse universe #Added by software-propertiesdeb http://mirrors.aliyun.com/ubuntu/ xenial universedeb http://mirrors.aliyun.com/ubuntu/ xenial-updates universedeb http://mirrors.aliyun.com/ubuntu/ xenial multiversedeb http://mirrors.aliyun.com/ubuntu/ xenial-updates multiversedeb http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ xenial-backports main restricted universe multiverse #Added by software-propertiesdeb http://archive.canonical.com/ubuntu xenial partnerdeb-src http://archive.canonical.com/ubuntu xenial partnerdeb http://mirrors.aliyun.com/ubuntu/ xenial-security main restricteddeb-src http://mirrors.aliyun.com/ubuntu/ xenial-security main restricted multiverse universe #Added by software-propertiesdeb http://mirrors.aliyun.com/ubuntu/ xenial-security universedeb http://mirrors.aliyun.com/ubuntu/ xenial-security multiverse

网易163源：

deb http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse

deb http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ xenial-backports main restricted universe multiverse

（3）sudo apt-get update       //更新源

（4）sudo apt-cache search 命令   //当不知道对应命令需要下载的软件包的名称时，可以使用该命令进行查找  ，如 sudo apt-cache search xfreerdp

（5）sudo apt-get install 软件名     //下载对应的软件 , 如sudo apt-get install freerdp

2、Centos 更换源

以centos7.2为例

(1) cd  /etc/yum.repos.d       //进入yum源配置文件所在文件夹
(2) mv  CentOS-Base.repo  CentOS-Base.repo.bak      //备份原有的源文件
(3) 下载对应的yum源文件
    163源：wget http://mirrors.163.com/.help/CentOS6-Base-163.repo
    阿里源：wget http://mirrors.aliyun.com/repo/Centos-7.repo
    将文件改名为 ：CentOS-Base.repo
(4) yum  clean  all           //清理缓存
(5) yum  makecache         //重新生成缓存
(6) yum  -y  update         //更新系统
(7) yum  -y  install  软件名     //下载对应的软件 , 如yum -y install vim