ubuntu18.04更换阿里源

要将Ubuntu 18.04更换为阿里源，您可以按照以下步骤进行操作：

1. 备份原来的系统默认源：打开终端，执行以下命令进行备份：

   sudo cp /etc/apt/sources.list /etc/apt/sources_init.list

2. 打开源文件进行编辑：执行以下命令打开源文件：

   sudo gedit /etc/apt/sources.list

3. 在gedit文本编辑器中，将下面的阿里源复制粘贴到源文件中：

   deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-updates main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-proposed main restricted universe multiverse
   deb http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse
   deb-src http://mirrors.aliyun.com/ubuntu/ bionic-backports main restricted universe multiverse

4. 保存并关闭文件。

通过执行以上步骤，您已成功将Ubuntu 18.04更换为阿里源。这样可以提高您的网速，使软件下载更加快速。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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