I would like to issue some commands in the Bitcoin-qt console and save their output to a text file (ideally, filter it before saving). Is there a way to do that, similar to how I would use
> in a regular Linux terminal?
You can install
bitcoin-cli, and update your
bitcoin.conf to enable the RPC server.
bitcoin-cli will let you pipe the output from the commands through to any shell commands you want, or redirect to a file.