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//更换清华源
?? ?apt install vim
?? ?vim /etc/apt/sources.list
//----------------------------------------------------------------------------
?? ?# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
?? ?deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
?? ?# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse
?? ?deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
?? ?# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
?? ?deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
?? ?# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
?? ?deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
?? ?# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse
?? ?# 预发布软件源，不建议启用
?? ?# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
?? ?# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
//-------------------------------------------------------------------------------------------
?? ?apt update
?? ?apt install flex bison libelf-dev libssl-dev make build-essential ?kernel-package ?libncurses5-dev qt5-default dwarves
?? ?
?? ?apt install linux-source
?? ?cd /usr/src/linux-source-5.4.0
?? ?tar xvzf linux-source-5.4.0.tar.bz2
?? ?cd linux-source-5.4.0
?? ?make mrproper
?? ?cp /boot/config-5.4.0-109-generic ./.config
?? ?make -j16
?? ?make modules -j16
?? ?如果报错如下：
?? ??? ?make[1]: *** No rule to make target 'debian/canonical-revoked-certs.pem', needed by 'certs/x509_revocation_list'. ?Stop.
?? ??? ?make: *** [Makefile:1868: certs] Error 2
?? ??? ?在命令行中执行：scripts/config --disable SYSTEM_REVOCATION_KEYS
?? ?make modules_install ? //拷贝modules到 /lib/modules/5.4.192
?? ?make bzImage
?? ?make install ? ?//安装内核到/boot目录
?? ?update-grub
?? ?reboot
?? ?开机按住shift，选择新内核
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