Unlike many coins, we spend a lot of time on writing high-quality and easy to follow tech tutorials to simplify explaining things most coins don't bother explaining....
Perhaps for Windoze noobs, but there are gaps in the steps for linux users on how to mine, like how to select the correct YAM file to download off mega-dl site for the CPU being used to mine with.
Q1: Why do you use the proprietary YAM miner in your tut? According to Atithasos it takes 2.5% of the proceeds. Atithasos says the lucas jones (wolf miner) can also be used, but it's a GPU miner not a CPU miner. I'll check into it. It requires compilation but that should be no problem. I do understand why you don't get into
detailed instructions for linux users, most of whom probably already know how to mine, compile and use cmd line tools. A few words might be nice for those that are new to it tho.
Q2: Can old machines be used to pool mine bipcoin? I am going to try to use an old 2Ghz system with 3GB RAM running a single core AMD 64 bit CPU. It's pretty snappy with Ubuntu 14.04 but that CPU is quite old. Tho mobo in that system has an integrated GPU, so if the wolf miner will work on that system it might produce a better hash rate than a CPU miner would.
Yam is better for CPU mining if you run it as root in linux or administrator in windows.. Since now it gives you 20% more hashing power.
Yam takes 2.5% of the share hashing power to mine the coin that you choose /xmr at the end of your address. This means nothing for me due to the power that you have. is the most efficient CPU miner since now.
There is also the cgminer right now but i have not tested. cgminer is CPU and GPU miner.
More info about sgminer you can find here
https://bitcointalk.org/index.php?topic=1612329.0GPU mining is not for integrated video cards.