I've been learning Linux by experimenting in virtual machines, and I've built a setup I really like in terms of applications and desktop customization. I'd like to automate the process so I can reproduce it after reinstalling Fedora Silverblue instead of trying to remember every manual step.
The script would remove the default Flatpaks, add Flathub, install the applications I use, install and configure Distrobox, hide unwanted applications, and customize GNOME. I've never written Bash before, so I'm looking for advice on how to structure a beginner-friendly post-installation script. Should I keep the code as simple as possible, and what should I know about making each step idempotent so the script can be run repeatedly without causing problems?
3 Answers
Start with one small, concrete task and do it manually from the terminal first. Once you know the exact commands, put them into a script and test it in a disposable VM. Keep adding small scripts for separate tasks, then create one orchestration script that calls them in the order you need. Git is useful even for a personal project because you can track changes and roll back mistakes.
A Bash script is essentially a saved list of terminal commands, executed from top to bottom. You can begin with something tiny, such as a script containing an `echo` command, then gradually add real setup steps. Don’t try to build the entire post-install process at once; add and test one section at a time.
First decide exactly what the automation should accomplish, then break it into independent steps. For example, use separate functions or scripts for Flatpak setup, application installation, Distrobox configuration, and GNOME preferences. Make each operation safe to run more than once: check whether a repository, package, remote, setting, or container already exists before adding it. Also consider using `set -euo pipefail`, quote variables, check command failures, and run ShellCheck against the script. Since Silverblue has an immutable base system, make sure each action uses the appropriate tool, such as Flatpak, rpm-ostree, or Distrobox, rather than treating it like a traditional mutable installation.
That makes sense. I’m mainly trying to preserve a known-good setup so a future reinstall is repeatable, rather than writing a script just for its own sake.