配置apt源
//腾讯源
deb http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse
//网易源
deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
# deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
# deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
//中科大
# 默认注释了源码仓库，如有需要可自行取消注释
deb https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
# 预发布软件源，不建议启用
# deb https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
# deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
更新
sudo apt-get update
sudo apt-get upgrade
处理内核
sudo dpkg --get-selections | grep linux #查看已安装的内核
sudo apt remove linux-image-x.xx.x-xx-generic #删除新内核
sudo apt install linux-image-x.xx.x-xx-generic #安装原内核
锁定kernel
apt-mark hold linux-image-5.4.0-42-generic
apt-mark hold linux-modules-extra-5.4.0-42-generic
解除内核锁定
sudo apt-mark unhold linux-image-5.4.0-42-genericlinux-headers-5.4.0-42-generic
sudo apt update
安装并配置git
sudo apt-get install git
git --config user.name "xxx"
git --config user.email xxx@email.com
git --config --list
ssh-keygen -t rsa -C xxx@email.com
git 拉取分支
git clone git@github.com:tianocore/edk2.git
git submodule init //拉取子模块
