当apt更新debian 11时无法解决“deb.debian.org”问题

Question

我安装了Debian11Bullseye，下面是我的source.list文件：

deb http://deb.debian.org/debian bullseye main contrib non-free
deb-src http://deb.debian.org/debian bullseye main contrib non-free

deb http://security.debian.org/debian-security bullseye-security main contrib non-free
deb-src http://security.debian.org/debian-security bullseye-security main contrib non-free

deb http://deb.debian.org/debian bullseye-updates main contrib non-free
deb-src http://deb.debian.org/debian bullseye-updates main contrib non-free

deb http://deb.debian.org/debian bullseye-backports main contrib non-free
deb-src http://deb.debian.org/debian bullseye-backports main contrib non-free

当我尝试用apt update更新时，下面是我得到的错误：

Err:1 http://deb.debian.org/debian bullseye InRelease
Could not resolve 'deb.debian.org'
Err:2 http://security.debian.org.debian-security bullseye InRelease
Could not resolve 'deb.debian.org'
Err:3 http://deb.debian.org/debian bullseye-updates InRelease
Could not resolve 'deb.debian.org'
Err:4 http://security.debian.org.debian bullseye-backports InRelease
Could not resolve 'deb.debian.org'
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
All packages are up to date.
W: Failed to fetch http://deb.debian.org/debian/dists/bullseye/InRelease Could not resolve 'deb.debian.org'
W: Failed to fetch http://security.debian.org/debian-security/dists/bullseye-security/InRelease Could not resolve 'security.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/bullseye-updates/InRelease Could not resolve 'deb.debian.org'
W: Failed to fetch http://deb.debian.org/debian/dists/bullseye-backports/InRelease Could not resolve 'deb.debian.org'
W: Some index files failed to download. They have been ignored, or old ones used instead.

我的source.list文件有什么问题？还有什么要安排的吗？

Answer 1

作为根用户，创建/etc/resolv.conf (CLI cp /etc/resolv.conf /etc/resolv.conf.orig)的副本。然后运行以下命令。

# printf '%s\n' 'nameserver 1.1.1.1' 'nameserver 1.0.0.1' > /etc/resolv.conf
# ping -c 4 deb.debian.org; printf 'Return code: %s\n' "$?"

如果最后一行是Return code: 0，那么apt update应该可以正常工作。