我正在尝试安装Mono 4.8 in a Docker图片，但我下载失败。这是 dockerfile
RUN apt-get update \
&& apt-get install -y curl \
&& rm -rf /var/lib/apt/lists/* \
&& apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF \
&& echo "deb http://download.mono-project.com/repo/debian wheezy main" >> /etc/apt/sources.list.d/mono-xamarin.list \
&& echo "deb http://download.mono-project.com/repo/debian wheezy-apache24-compat main" >> /etc/apt/sources.list.d/mono-xamarin.list \
&& echo "deb http://download.mono-project.com/repo/debian wheezy-libjpeg62-compat main" >> /etc/apt/sources.list.d/mono-xamarin.list \
&& apt-get update \
&& apt-get install -y clang \
&& apt-get install -y mono-complete=4.8.0.520-0xamarin3
无法安装单竞争并出现此错误消息
E: Version '4.8.0.520-0xamarin3' for 'mono-complete' was not found
我想知道 mono-complete 4.8 版本应该是什么？
Pin the version to the snapshots目录：
echo "deb http://download.mono-project.com/repo/ubuntu wheezy/snapshots/4.8.0.520 main" | sudo tee /etc/apt/sources.list.d/mono-official.list
获取所需的依赖项：
sudo apt install gnupg ca-certificates
添加存储库密钥：
sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys A6A19B38D3D831EF
更新包索引：
sudo apt-get update
修改/更新缓存后，您可以使用apt-cache policy {package}以确定您要安装的版本是否可用。
>apt-cache policy mono-complete
mono-complete:
Installed: (none)
Candidate: 4.8.0.520-0xamarin3
Version table:
4.8.0.520-0xamarin3 500
500 http://download.mono-project.com/repo/ubuntu wheezy/snapshots/4.8.0.520/main amd64 Packages
4.6.2.7+dfsg-1ubuntu1 500
500 http://us.archive.ubuntu.com/ubuntu artful/universe amd64 Packages
现在您可以安装4.8.0.520-0xamarin3:
sudo apt-get install -y mono-complete=4.8.0.520-0xamarin3
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