[main] Improve modules/ROOT/pages/update-streams.adoc (how to check current stream ?)

[udf2457]

At present the docs cover:

• What streams are available
• Switching between streams.

However the docs do not cover how to check what stream you are currently on.

As a CoreOS noob, this sort of thing could be quite useful. Otherwise I have to resort to $search_engine to find out how.

[hrismarin]

The os-release file in the /etc directory is a text file that contains information about the Linux-based operating system (OS). It provides essential details such as the OS name, version, and other system-related identifiers. Reading this file, e.g. cat /etc/os-release will display the Fedora CoreOS stream in the RELEASE_TYPE identification parameter.

Since this is not specific to Fedora CoreOS, I'm not sure if such an instruction would be relevant to include on this particular page.

[udf2457]

Fair enough, for some reason it did not occur to me to check /etc/os-release I just assumed the stream detail was hidden elsewhere.

[dustymabe]

However the docs do not cover how to check what stream you are currently on.

Right now I would just tell someone to run rpm-ostree status:

core@localhost:~$ rpm-ostree status 
State: idle
AutomaticUpdatesDriver: Zincati
  DriverState: active; periodically polling for updates (last checked Wed 2025-02-12 14:20:42 UTC)
Deployments:
● fedora:fedora/aarch64/coreos/testing
                  Version: 41.20250130.2.0 (2025-01-31T22:06:10Z)
                   Commit: dd57816f8920bec00095f3f867a56a06f1af1f803736bc95f3a0ecdbfa386a68
             GPGSignature: Valid signature by 466CF2D8B60BC3057AA9453ED0622462E99D6AD1

  fedora:fedora/aarch64/coreos/testing
                  Version: 41.20250117.2.0 (2025-01-21T02:05:34Z)
                   Commit: 28f861b1b540f004b4892bb69563bb4fceebd7405d50ab9d5754bc6aa0f526bc
             GPGSignature: Valid signature by 466CF2D8B60BC3057AA9453ED0622462E99D6AD1

which shows (in this example): fedora/aarch64/coreos/testing

I guess we could add something like that to the docs?

[hrismarin]

I guess we could add something like that to the docs?

I can open a PR to include both commands with a brief explanation.