Ubuntu 18.04 更换阿里源
我们在装好Ubuntu18.04之后，通常都要设置下root用户密码和配置下国内的阿里源。
接下来，讲下Ubuntu18.04如何配置阿里源！
1.第一步：备份 sources.list
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
2.第二步：编辑 sources.list
sudo vim /etc/apt/sources.list
3.第三步：删除原文件内容，替换下面的阿里源！
deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
4.第四步：更新！
sudo apt update
5.第五步：升级！
sudo apt upgrade
至此，Ubuntu18.04更换阿里源就好了。如果有什么问题可以加我QQ群问！
QQ群号：701981206
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