How to open with default app PDF or OTHER files OUTSIDE the vault?

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@ariehen ,

you suggestion

I believe you are looking for some pfd](file:////home...

is exactly what I said I had tried, without success, before posting:

but just for the sake of it, I tried again, and I confirm it does not work. Nothing happens. Ditto for the suggestion by @Fuyuu : that is just a different method to generate the same markdown code, “file:///…” so it yelds the same results

HOWEVER…

I started obsidian from the command line, to view any error message, and indeed, when I click on the link in obsidian, it says so:

Opening file: /home/work/archive/testfile.pdf
grep: /proc/sys/fs/binfmt_misc/WSLInterop: No such file or directory
/usr/bin/wslview: line 31: echo: write error: Bad file descriptor
grep: /proc/sys/fs/binfmt_misc/WSLInterop: No such file or directory
/usr/bin/wslview: line 48: echo: write error: Bad file descriptor
/usr/bin/wslview: line 216: /mnt/c/Windows/System32/reg.exe: No such file or directory
/usr/bin/wslview: line 308: [: -ge: unary operator expected
/usr/bin/wslview: line 94: echo: write error: Bad file descriptor

where wslview is this.

So the problem is… why on Earth does Obsidian tries to use Windows “stuff” on Linux??? And how to tell it to stop doing that, and use the Linux applications?