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## 1.更换系统软件源
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在上一篇文章中,我们从刚装好的 PVE 系统中获取了系统的一些参数:
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此处显示出 PVE 底层使用的是 Debian的 系统,代号为 “bullseye”。
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为了后续能够对 PVE 系统进行升级,需要更换其镜像仓库,也就是大家熟知的软件源。
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由于我们目前处于“离线”安装状态,因此更换完软件源后,在没有网络的情况下无法对系统更新。
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### 1.1.系统软件源替换
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首先对现有的软件源配置进行备份:
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```bash
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## 进入系统软件源配置文件目录
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cd /etc/apt
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## 将默认软件源配置文件进行备份
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cp sources.list sources.list.bak
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```
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这里我将使用中国科技大(USTC)的镜像仓库进行替换,使用如下命令:
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**注意:该命令为两行,在输入时请逐行输入并回车执行**
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```bash
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## 替换系统软件仓库
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sed -i 's|^deb http://ftp.debian.org|deb https://mirrors.ustc.edu.cn|g' /etc/apt/sources.list
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sed -i 's|^deb http://security.debian.org|deb https://mirrors.ustc.edu.cn/debian-security|g' /etc/apt/sources.list
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```
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执行完成后,检查是否执行正确:
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```bash
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## 输出系统源配置文件,检查是否正确
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cat /etc/apt/sources.list
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```
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如果输出结果中有 USTC 的镜像地址,则表示命令已经正确执行:
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```bash
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## 输出内容参考:
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deb https://mirrors.ustc.edu.cn/debian bullseye main contrib
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deb https://mirrors.ustc.edu.cn/debian bullseye-updates main contrib
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# security updates
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deb https://mirrors.ustc.edu.cn/debian-security bullseye-security main contrib
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```
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此处我放出 Debian Bullseye 的完整镜像源以供参考, **非常不建议** 将 PVE 的系统源替换成完整的 Debian 源,以避免出现问题。
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```bash
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## Debian Bullseye 完整源 (USTC)
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deb https://mirrors.ustc.edu.cn/debian/ bullseye main contrib non-free
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#deb-src https://mirrors.ustc.edu.cn/debian/ bullseye main contrib non-free
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deb https://mirrors.ustc.edu.cn/debian/ bullseye-updates main contrib non-free
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#deb-src https://mirrors.ustc.edu.cn/debian/ bullseye-updates main contrib non-free
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deb https://mirrors.ustc.edu.cn/debian/ bullseye-backports main contrib non-free
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#deb-src https://mirrors.ustc.edu.cn/debian/ bullseye-backports main contrib non-free
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deb https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free
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#deb-src https://mirrors.ustc.edu.cn/debian-security/ bullseye-security main contrib non-free
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```
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可以看到,PVE 的系统源和 Debian 完整源的差异在于 “non-free” 和 “bullseye-backports”。
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如果小伙伴在一些软件或者驱动(比如闭源 GPU 驱动)上遇到问题,可以尝试将PVE的系统源替换成Debian的完整源来尝试解决问题。
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