Ubuntu的软件源设置文件位于 `/etc/apt/sources.list`,我们可以通过修改该文件来
更换 镜像源。
以下是
更换为阿里云
镜像源的步骤:
1. 备份原有的软件源设置文件
 sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak  
 
2. 使用文本编辑器打开 `/etc/apt/sources.list` 文件
 sudo nano /etc/apt/sources.list  
 
3. 将原有的内容注释掉,添加阿里云
镜像源的内容
# 以下为原有的内容,注释掉# deb http://archive.ubuntu.com/ubuntubionic main restricted universe multiverse# deb-src http://archive.ubuntu.com/ubuntubionic main restricted universe multiverse# deb http://archive.ubuntu.com/ubuntubionic-updates main restricted universe multiverse# deb-src http://archive.ubuntu.com/ubuntubionic-updates main restricted universe multiverse# deb http://archive.ubuntu.com/ubuntubionic-backports main restricted universe multiverse# deb-src http://archive.ubuntu.com/ubuntubionic-backports main restricted universe multiverse# deb http://archive.ubuntu.com/ubuntubionic-security main restricted universe multiverse# deb-src http://archive.ubuntu.com/ubuntubionic-security main restricted universe multiverse# 以下为阿里云镜像源的内容deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
4. 保存并退出编辑器
按下 `Ctrl + X`,然后按下 `Y` 确认保存。
5. 更新软件源
 sudo apt update  
 
现在,你已经成功
更换 Ubuntu的
镜像源了。
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