Ubuntu20.04桌⾯版图⽂安装（超详细）
解决Ubuntu当发现⾃⼰选择语⾔时汉语中⽂是灰⾊不能选中，安装了中⽂包也没⽤时
先添加汉语，装好语⾔包后把中⽂的拖到最上⾯
退出登陆，再重新登陆
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal main restricted
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-updates main restricted
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal universe
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-updates universe
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal multiverse
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-updates multiverse
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-backports main restricted universe multiverse
ubuntu安装教程
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-security main restricted
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-security universe
deb mirrors.tuna.tsinghua.edu/ubuntu/ focal-security multiverse
deb archive.ubuntu/ubuntu/ trusty main universe restricted multiverse