First of all – install Ubuntu . This should be actually straight forward. After running the installation I suggest to do a software update. Just drop the more or less “standard” lines:
sudo apt-get updatesudo apt-get upgrade
To be able to mine, I suggest to check the video card drivers. In my case for the Nvida GTX 780 I use the nvidia-384 proprietary drivers. The following guide might be useful  for the installation – either via graphical user interface or via command line.
Now let us install the ethminer. Fast and easy with the following commands as pointed out at :
sudo apt-get install software-properties-common sudo add-apt-repository ppa:ethereum/ethereum sudo apt-get update sudo apt-get install ethereum ethminer
And for the first test I run it on an Expanse Pool :
Starting it the first time, it takes some time to load the DAG, but once it’s loaded the miner performs better as expected showing a Hash Rate of approximately 17 MH/s – on the miner and on the pool.
For an autostart of the ethminer process, I will drop another blog entry within the next days/weeks.