Installing Root CA file from Start9 server to Ubuntu after installing on Android first

I installed the Root CA on my Android phone as I didn’t have a laptop at the time. I now have a laptop running Unbuntu which I also want to install the Root CA on.

The issue I’m having is actually getting the file across to my laptop from the server. Has anyone been able to send the Root CA off their server to a device and if so can you please explain how?

When I download the file on my android phone it doesn’t recognise the file and seems to disappear from my downloads folder so I can’t forward the file onto my laptop.

If you can find the file on your Android then you can simply email it to yourself and then download the file via email onto your laptop.Or you can visit your .local address using your laptop, login from there and downlad your Root CA onto the laptop from your server