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时间: 2024-10-17 21:15:15 浏览: 32
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Ubuntu 20.04是一个基于Linux的开源操作系统,其默认软件包源主要来自于Canonical官方提供的Ubuntu仓库。如果你想要更换为中国中科大阿里云的源(也称为阿里云镜像),可以按照以下步骤操作:
1. **备份当前源列表**:首先,为了保险起见,建议先备份系统原有的sources.list文件,以免误删重要信息。打开终端,输入以下命令:
```
sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak
```
2. **添加中科大阿里云镜像**:在终端中编辑sources.list文件,你可以使用文本编辑器如nano:
```
sudo nano /etc/apt/sources.list
```
然后在文件底部添加中科大阿里云的apt源:
```bash
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse
```
3. **更新密钥**:切换到中科大阿里云的存储库需要相应的密钥。运行:
```
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys EEA14886
```
4. **刷新索引**:安装新源并更新缓存:
```
sudo apt update
```
5. **开始安装**:现在你可以使用新的阿里云镜像安装软件了:
```
sudo apt install <package-name>
```
记得替换`<package-name>`为你想要安装的具体软件包名。
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