debian-backports的引脚优先级定义在哪里？

Question

在Debian的领导下，我第一次在我的包源代码中得到了支持。

我在apt中遇到了一些冲突，因为我从http://www.deb-multimedia.org/安装的一些包在后端有更高的版本。

多媒体的第一要害是100.我试图将backports的优先级设置为-1，但它没有工作。

LANG=C cat /etc/apt/preferences
Package: *
Pin: origin deb http://http.us.debian.org/debian jessie-backports main
release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=non-free
Pin-Priority: -1

Package: *
Pin: origin deb http://http.us.debian.org/debian jessie-backports main
release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=main
Pin-Priority: -1

Package: *
Pin: origin deb http://http.us.debian.org/debian jessie-backports contrib
release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=contrib
Pin-Priority: -1

Package: *
Pin: origin www.deb-multimedia.org
Pin-Priority: 300 
`

我的/etc/apt/preferences怎么了？

     LANG=C apt-cache policy | grep backports | egrep -i -v translat
 100 http://http.us.debian.org/debian/ jessie-backports/non-free i386 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=non-free
 100 http://http.us.debian.org/debian/ jessie-backports/contrib i386 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=contrib
 100 http://http.us.debian.org/debian/ jessie-backports/main i386 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=main
 100 http://http.us.debian.org/debian/ jessie-backports/non-free amd64 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=non-free
 100 http://http.us.debian.org/debian/ jessie-backports/contrib amd64 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=contrib
 100 http://http.us.debian.org/debian/ jessie-backports/main amd64 Packages
     release o=Debian Backports,a=jessie-backports,n=jessie-backports,l=Debian Backports,c=main

文件夹

ls -al /etc/apt/preferences.d/
insgesamt 8
drwxr-xr-x 2 root root 4096 Jan 25  2011 .
drwxr-xr-x 6 root root 4096 Dez 11 11:53 ..

是空的。

Answer 1

您只需要一个带有适当存档名称的条目：

Package: *
Pin: release a=jessie-backports
Pin-Priority: -1

请注意，默认情况下，backports被固定为100，因此除非您指定-t jessie-backports，否则它们不是安装候选。不过，我不知道如何处理其他来源的软件包，尤其是如果它们的版本比稳定的包要高.