Silverblue is all about flatpaks for the desktop experience, but for the command line, look at toolbox — or as we’re now spelling it, to make search more possible, toolbx.
This gives you a command-line environment into which you can install official Fedora packages with DNF:
$ toolbox enter
last: cannot open /var/run/utmp: No such file or directory
toolbox:~$ sudo dnf install exa fzf
Last metadata expiration check: 0:00:41 ago on Sat 04 Dec 2021 10:56:37 AM EST.
Dependencies resolved.
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Package Architecture Version Repository Size
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Installing:
exa x86_64 0.10.1-2.fc35 fedora 340 k
fzf x86_64 0.28.0-1.fc35 updates 1.1 M
Installing dependencies:
http-parser x86_64 2.9.4-5.fc35 fedora 37 k
libgit2 x86_64 1.1.0-5.fc35 fedora 462 k
libssh2 x86_64 1.10.0-1.fc35 fedora 117 k
Transaction Summary
================================================================================
Install 5 Packages
Total download size: 2.0 M
Installed size: 5.5 M
Is this ok [y/N]: y
Downloading Packages:
[...]
Complete!
toolbox:~$
If you don’t have a toolbox already set up, toolbox enter will ask if you want to create one. Say yes, and it’ll download and launch the latest container image. You may get errors about “locale” — run sudo dnf -y install glibc-langpack-en inside the container to fix.[1]
I’m also not sure what the /var/run/utmp message is there, or if it’s something specific to my system. I’ll investigate. 