1.修改flathub镜像源sudo flatpak remote-modify flathub --url=https://mirror.sjtu.edu.cn/flathub 2.安装更新和必要软件sudo apt update sudo apt upgrade sudo apt install numlockx 如果是nvidia显卡,还需要安装nvidia显卡驱动 sudo apt install nvidia-driver 3.安装启用fcitx5输入法apt install fcitx5 fcitx5-chinese-addons im-config 4.GRUB菜单中文乱码问题修复cd /boot/grub/fonts sudo cp UbuntuMono16.pf2 UbuntuMono16.pf2.bak sudo rm UbuntuMono16.