I'm trying to understand the underlying mechanisms of the default package manager on Ubuntu. Specifically, how are package dependencies resolved during installation, and what process ensures that system updates stay consistent without breaking existing software? Also, are there any best practices to follow when manually installing or removing packages to keep the system stable? I'd love to hear your explanations and any tips you use in daily workflow.
How does Ubuntu's default package management handle dependencies and updates?
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When I first upgraded from Ubuntu 16.04 to 20.04, apt automatically pulled in all required libraries and marked old ones for removal, so the system stayed consistent without any broken packages. My habit now is to let apt handle installs/removals, run `sudo apt update && sudo apt full-upgrade` regularly, and avoid mixing `dpkg -i` with manual dependency fixes unless I double‑check with `apt -f install`.