树莓派Ubuntu Mate 16.04 修改为国内更新源

收藏：https://blog.csdn.net/wang_shuai_ww/article/details/80386708

更换步骤

以root身份打开 /etc/apt/sources.list ，至于用什么打开随意

将 http://ports.ubuntu.com/ 全部替换为 http://mirrors.ustc.edu.cn/ubuntu-ports/ ，这是中科大的

执行 sudo apt-get update 和 sudo apt-get upgrade 测试

查看是否提供arm支持的方法

打开一个镜像站点，然后以此打开 /dists/xenial/main/ ，看这个目录下面有没有 binary-arm 这样的字眼，如果有，就是提供arm支持的

上面部分来自https://blog.csdn.net/wr132/article/details/56700479

下面贴出具体的代码：

## Note, this file is written by cloud-init on first boot of an instance 
## modifications made here will not survive a re-bundle. 
## if you wish to make changes you can: 
## a.) add \'apt_preserve_sources_list: true\' to /etc/cloud/cloud.cfg 
##     or do the same in user-data 
## b.) add sources in /etc/apt/sources.list.d 
## c.) make changes to template file /etc/cloud/templates/sources.list.tmpl

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to 
# newer versions of the distribution. 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial main restricted 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial main restricted


## Major bug fix updates produced after the final release of the 
## distribution. 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-updates main restricted 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-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.ustc.edu.cn/ubuntu-ports xenial universe 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial universe 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-updates universe 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-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.ustc.edu.cn/ubuntu-ports xenial multiverse 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial multiverse 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-updates multiverse 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-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.ustc.edu.cn/ubuntu-ports xenial-backports main restricted universe multiverse 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-backports main restricted universe multiverse 

deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security main restricted 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security main restricted 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security universe 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security universe 
deb http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security multiverse 
deb-src http://mirrors.ustc.edu.cn/ubuntu-ports xenial-security multiverse 

## Uncomment the following two lines to add software from Canonical\'s 
## \'partner\' repository. 
## This software is not part of Ubuntu, but is offered by Canonical and the 
## respective vendors as a service to Ubuntu users. 
# deb http://archive.canonical.com/ubuntu xenial partner 
# deb-src http://archive.canonical.com/ubuntu xenial partner