1.软件源

https://blog.csdn.net/u012308586/article/details/102953882

可以注释掉源码镜像（deb-src开头的），提高updata速度

2.对于R7000P AMD

加“ [arch=amd64] ”

eg:

deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse
deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse
deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse
deb [arch=amd64] https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse

3.sudo apt update 报错

（1）关于ppa

打开software&update:

取消报错项目前面的勾选：