How do I run GUI on Raspbian? I had this running perfectly and the blockchain was synching and at about 80% completion. I came home from work to a power outage.

I keep seeing to run bitcoin-qt, it doesn't appear that I have that. In /src/ I have bitcoin-cli, bitcoind, and bitcoin-tx. Obviously d is daemon, and -tx isn't what I want either. So I try

bitcoin-cli -datadir=/pi/home/bitcoin/
error: too few parameters (need at least command)
It seems like you simply haven't installed bitcoin-qt, if you install that then you can run it :)

I'm unsure exactly how the power outage and the datadir command at the end relate to the question though