First you might want to be in your home directory
run a "pwd" to make sure you are in home directory
if your not there run "cdhome/
username"
then do a "ls -al"
if cpp-ethereum is in your home directory just do a "sudo rm -rf cpp-ethereum" to remove the cpp-ethereum folder and all files in it as we will just start form scratch.
sudo apt-get update
sudo apt-get -y install software-properties-common
sudo add-apt-repository -y ppa:ethereum/ethereum
sudo apt-get update
sudo apt-get install git cmake libcryptopp-dev libleveldb-dev libjsoncpp-dev libjson-rpc-cpp-dev libboost-all-dev libgmp-dev libreadline-dev libcurl4-gnutls-dev ocl-icd-libopencl1 opencl-headers mesa-common-dev libmicrohttpd-dev build-essential -y
git clone https://github.com/Genoil/cpp-ethereum/
cd cpp-ethereum/
git checkout 110
mkdir build
cd build
cmake -DBUNDLE=miner ..
make -j8
cdusr/bin
sudo rm ethminer
sudo ln -shome/username/cpp-ethereum/build/ethminer/ethminer ethminer
type ethminer -V -G now to see if its version 110.
It should report "ethminer version 0.9.41-genoil-1.1"
If that don't work, you probably did something wrong.