Though I must have done it wrong because the PDF I got was an empty file. Maybe someone else can figure it out.
Discussion
I’m not at a terminal to verify, but your “bin/“ prefix seems to be causing the problem. Try it without the prefix
/bin/bitcoin-cli …
You need a slightly modified command for Umbrel.
Add these to your .bash_aliases and then logout and back in again and they should work.
There’s always something else I don’t know! 😆


