Ubuntu 21.04 更新源

 

修改阿里源为Ubuntu 18.04默认的源

　　sudo gedit /etc/apt/sources.list 　　

 

添加如下条目

deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ hirsute main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ hirsute-updates main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ hirsute-backports main restricted universe multiverse
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ hirsute-security main restricted universe multiverse

 

最后执行如下命令更新源
　　sudo apt-get update
　　sudo apt-get upgrade