在虚拟化基础设施或物理机上安装 Debian 11 Bullseye 后，您会发现 APT 存储库配置不正确。这些问题不适用于正确配置了 Debian 11 (Bullseye) 存储库的云映像。在本指南中，我们将向您展示如何将 Debian 11 Bullseye 官方存储库添加到 sources.list。
如果您尝试更新 APT 存储库，如运行 sudo apt update，会报错。解决此问题的方法是使用 Debian 11 (Bullseye) 默认更新和安全存储库正确更新 resources.list 文件。
当前文件内容：
cat /etc/apt/sources.list
# deb cdrom:[Debian GNU/Linux 11.0.0 _Bullseye_ - Official amd64 DVD Binary-1 20210814-10:04]/ bullseye contrib main
deb cdrom:[Debian GNU/Linux 11.0.0 _Bullseye_ - Official amd64 DVD Binary-1 20210814-10:04]/ bullseye contrib main
deb http://security.debian.org/debian-security bullseye-security main contrib
deb-src http://security.debian.org/debian-security bullseye-security main contrib
# bullseye-updates, to get updates before a point release is made;
# see https://www.debian.org/doc/manuals/debian-reference/ch02.en.html#_updates_and_backports
# A network mirror was not selected during install. The following entries
# are provided as examples, but you should amend them as appropriate
# for your mirror of choice.
#
# deb http://deb.debian.org/debian/ bullseye-updates main contrib
# deb-src http://deb.debian.org/debian/ bullseye-updates main contrib将 Debian 11 Bullseye 官方存储库添加到 sources.list，运行以下命令直接回车即可：
sudo tee /etc/apt/sources.list<<EOF
deb http://deb.debian.org/debian bullseye main
deb-src http://deb.debian.org/debian bullseye main
deb http://security.debian.org/debian-security bullseye-security main
deb-src http://security.debian.org/debian-security bullseye-security main
deb http://deb.debian.org/debian bullseye-updates main
deb-src http://deb.debian.org/debian bullseye-updates main
deb http://deb.debian.org/debian bullseye-backports main
deb-src http://deb.debian.org/debian bullseye-backports main
EOF完成后，更新您的 APT 索引以确认存储库正常工作：
sudo apt update添加官方操作系统存储库并确认其正常工作后，让我们更新系统软件包：
sudo apt upgrade如果可用，您还可以尝试发行版小幅升级：
sudo apt dist-upgrade如果需要，可以安装常用的操作系统管理工具：
sudo apt install git curl bash-completion wget curl vim telnet -y现在，您的 Debian 11 (Bullseye) 系统上已拥有正确的 sources.list 文件。
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