I can't answer your questions because I don't know much about RPi or BFGMiner, but I can tell you that there is no way that you can have a balance of 2 bitcoins.
Also, there is no point to mining bitcoins on a RPi. You won't earn much -- less than $1 over the next year, and it will consume a lot of electricity and is likely to overheat.
Also, there is no point to mining bitcoins on a RPi. You won't earn much -- less than $1 over the next year, and it will consume a lot of electricity and is likely to overheat.
A Raspberry dosnt consume a lot of electricity power at all and it maybe it takes less power as an radio.
The question is when he installed the BFGminer and started mining with it!
You are right there is now way that there anywhere 2 Bitcoins as he not have set up an Wallet.
The BFGminer commands normaly the same as in other versions for PC as i used the miner on my Pi3 with the Moonlander 2 Miner.
Code:
./bfgminer --help
you will find all the commands 
