Re: combining stable and testing in sources.list

[john doe <johndoe65534@mail.com>]

On 6/12/2018 9:15 PM, murtaugh@stat.orst.edu wrote:
> I mistakenly added two lines with 'testing' to my 'sources.list' file, 
> which now looks like this:
>
>     deb http://debian.osuosl.org/debian/ stretch main non-free contrib
>     deb-src http://debian.osuosl.org/debian/ stretch main non-free contrib
>
>     deb http://security.debian.org/debian-security stretch/updates main
>     contrib non-free
>     deb-src http://security.debian.org/debian-security stretch/updates
>     main contrib non-free
>
>     deb http://debian.osuosl.org/debian/ stretch-updates main contrib
>     non-free
>     deb-src http://debian.osuosl.org/debian/ stretch-updates main
>     contrib non-free
>
>     # my bad:
>     deb http://ftp.us.debian.org/debian/ testing main non-free contrib
>     deb-src http://ftp.us.debian.org/debian/ testing main non-free contrib
>
> I have read that it's difficult or impossible to revert to 'stable' once 
> 'testing' packages have been installed. I have also read that it's not a 
> good idea to have both 'stable' and 'testing' repositories in 
> 'sources.list', 

If you want to be able to install packages from the testing repositories 
while being on stable you should realy have a look at 'apt-pinning':

https://jaqque.sbih.org/kplug/apt-pinning.html

If you install packages from testing while being on stable be warned 
about possible dependencies issues!

--
John Doe