Unbuntu 20.04 source list

替换文件:/etc/apt/sources.list
有代理的同学:可以添加代理文件/etc/apt/apt.conf.d/proxy.conf:
Acquire::http::Proxy “http://proxyaddress:proxyport”;
Acquire::https::Proxy “https://proxyaddress:proxyport”;

# aliyun
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-security main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security 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-proposed main restricted universe multiverse
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed 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
//zhongkeda
deb https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu/ focal-proposed main restricted universe multiverse
//163
deb http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ focal main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ focal-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ focal-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ focal-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ focal-backports main restricted universe multiverse

<think>嗯,用户想替换Ubuntu 20.04sources.list为阿里云镜像源。我需要回忆一下步骤,确保正确性。首先记得要备份原文件,避免出错。然后替换内容,可能需要先删除原文件内容或者直接覆盖。阿里云的镜像源地址应该是什么?对了,不同版本的Ubuntu代号不同,20.04是focal,所以镜像源链接里要包含focal这个词。然后更新软件列表,可能需要sudo权限。对了,用户可能不熟悉终端操作,所以步骤要详细,比如使用sed命令或者手动编辑。另外,可能还要提到如何恢复默认源,如果有问题的话。还要检查引用来源,确保步骤和参考的引用一致。比如引用[4]提到备份和替换,引用[2]提到版本代号。可能用户误操作后需要恢复,引用[3]有提到恢复方法。所以回答里应该包含备份、替换、更新,以及恢复的方法。还要注意命令的正确性,比如使用tee命令或者直接编辑。可能需要提醒用户使用sudo权限,以及更新后执行apt update。对了,用户可能关心是否所有步骤都安全,所以强调备份的重要性。另外,是否需要注释掉原有的源,还是直接覆盖?根据引用[4],是直接替换整个文件内容。所以步骤应该是备份,写入新的源内容,保存,然后更新。最后检查是否有错误,比如拼写错误或权限问题。好的,这样步骤应该没问题。</think>### 替换Ubuntu 20.04sources.list为阿里云镜像源 #### 步骤说明 1. **备份原文件** 执行以下命令备份系统默认的源文件,防止操作失误后恢复[^4]: ```bash sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak ``` 2. **编辑sources.list文件** 使用以下命令清空原文件并写入阿里云镜像源内容: ```bash sudo tee /etc/apt/sources.list << EOF deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse EOF ``` **注意**: 若需手动编辑,可使用`sudo nano /etc/apt/sources.list`,替换全部内容后保存。 3. **更新软件列表** 执行以下命令使新配置生效: ```bash sudo apt update ``` 4. **验证操作** 若更新过程中未报错且速度明显提升,说明镜像源已生效[^1][^2]。 --- #### 恢复默认源的方法 若需恢复原配置,执行: ```bash sudo cp /etc/apt/sources.list.bak /etc/apt/sources.list sudo apt update ``` 此操作将还原备份的默认源文件[^3]。 ---
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