I want a simple offline file with a list of all my posts

All your post content is saved in the posts table in your database. You could export from there but you may have to do a little cleaning up to get it how you want.

If you or your hosts has wp-cli you can do this:

wp post list --fields=ID,post_title

which gives you:

+----+------------------------------------------------+
| ID | post_title                                     |
+----+------------------------------------------------+
| 14 | Natus eum reprehenderit id                     |
| 11 | Aspernatur amet id harum distinctio            |
| 13 | Itaque maiores vero quo consequatur atque enim |
| 12 | Facere nemo repellendus non                    |
| 15 | Vel impedit iusto maiores                      |
| 1  | Hello world!                                   |
+----+------------------------------------------------+

@dave.
You have to understand that most of us are actually beginners.

“you can do this”

Of course I see that’s a piece of code, but you got to tell me where exactly I type that code so that I see that result…

Take a look at the wp-cli site to see if your set-up matches the requirements.

https://wp-cli.org/

It’s an amazingly easy tool to use.

Oh, so that’s a tool. See how confusions arise?

So it needs Unix operating systems. Well, I have Linux, so I’ll give that a try. Thanks.

I did the steps, but wp --info doesn’t work: wp: command not found, says the Terminal.

Where did you copy the wp executable? Maybe /usr/local/bin/ (the default location) isn’t in your path on your Linux distro. You could try copying it to /usr/bin instead.

sudo mv wp-cli.phar /usr/bin/wp

I moved it to a different directory. Won’t that work? I moved that to home/desktop/exodata (exodata is a folder).

If exodata is in your path, yes. If not, you’d have to supply the full path when using wp.

Or try it with a plugin:
https://www.ads-software.com/plugins/export-to-text