I got that far. I ran into trouble after installing datum. 

"If you already have Core installed, to install Knots you should: In the StartOS System tab, click the “Manage” heading 5+ times to enable developer mode. Click “Reinstall” on Knots in the Community Registry. If you get a notification claiming the install failed. Don’t worry, it succeeded."
 It will then show as bitcoin knots under services.

Merkle_Tree_hugger

I just want to toss my ignorant two sats in. I ran knots on Start9. It's on the community registry rather than the regular Start9 registry. It's a bit confusing because you can't tell from the services page whether you are actually running knots or core. It's not idiot (sight) proof. I managed to fuck up my server making changes and finally reverted to core. Just an FYI. Not everyone is as tech challenged as me.

bitcoin

How to run BITCOIN KNOTS: Desktop, Umbrel and Start9 PLUS Connect Sparrow Wallet

BTCsessions

I just want to toss my ignorant two sats in. I ran knots on Start9. It's on the community registry rather than the regular Start9 registry. It's a bit confusing because you can't tell from the services page whether you are actually running knots or core. It's not idiot (sight) proof. I managed to fuck up my server making changes and finally reverted to core. Just an FYI. Not everyone is as tech challenged as me. 