标签：restrict soft isp add 自己 版本 ict height ble
换源准备：
换源之前明确使用平台，X86架构、ARM架构的源，ubuntu18.04和unbuntu16.04等源均不同，切忌病急乱投医，看到一个源复制过来添加后没用。
分析一条源：
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu/bionic-updates main restricted universe multiverse
从左到又依次为：
镜像网址:http://mirrors.tuna.tsinghua.edu.cn
计算机架构对应关系：
| 计算机架构 | 代号 |
| X86 | ubuntu |
| ARM | ubuntu-ports |
系统版本号对应关系:
| 版本 | 版本号 | 代号 |
| Lucid(10.04) | 10.04 | lucid |
| Precise(12.04) | 12.04 | precise |
| Trusty(14.04) | 14.04 | trusty |
| Utopic(14.10) | 14.10 | utopic |
| Ubuntu 16.04 TLS | 16.04 | xenial |
| Ubuntu 18.04 TLS | 18.04 | bionic |
综上TX2（18.04系统版本）的一条更新格式为
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
换源步骤
1.获得root权限
sudo su
2.打开源配置文件
gedit /etc/apt/sources.list
3.删除原来的文件并且换成自己想换的源
#清华的源(ARM)
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-updates main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-updates main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-security main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-security main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-backports main restricted universe multiverse
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial-backports main restricted universe multiverse
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial main universe restricted
deb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ xenial main universe restricted
#阿里源(x86)
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
4.更新软件列表
apt update
5.更新软件包
apt upgrade
附组件：
main： 免费，Ubuntu 官方维护的自由软件； restricted： 不免费，但是正规支持的，一般是设备专有驱动； universe：免费，社区维护的自由软件； multiverse：不免费，无正规支持，非自由软件；
security：重要的安全更新；
updates：非安全性更新，即不影响到系统安全的 bug 修补；
proposed：预更新，小 beta 版，过后会进入[updates]或[security]；
backports：新软件的反向导出，新软件为老系统编译的版本；
组件参考：http://www.voidcn.com/article/p-zctkgwyc-bsd.html
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标签：restrict soft isp add 自己 版本 ict height ble
原文地址：https://www.cnblogs.com/liptom/p/12155870.html
