Debian4Engr Series: 03 Recommended sources.list & apt preferences

My Debian sources.list is:

and my apt preferences file is:

I have kept lower priorities in preference for testing and unstable because they are not recommended for stable production system and may crash your system.

After setting preferences, you need to put ‘-t {repo type}’ for installation e.g.,

 
 

Reference: Apt-Pinning for Beginners

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