Install Monero (from source) script (Ubuntu 14.04)

#!/bin/bash
#This script will install monero with all of it's requirements.

#Installing general requirements
sudo apt-get -y install python-software-properties
sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get -y install gcc-4.8 g++-4.8 rlwrap git cmake build-essential

cd ~
clear
echo "This is the monero installation script. It will install monero with all it's requirements, starting with the latest boost-version, plus CPUMiner"
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
echo "[1] INSTALL Monero essentials (wallet + solominer)"
echo "[2] INSTALL Wolf's poolminer"
echo "[3] INSTALL Everything"
echo "[6] UPDATE  Monero essentials (wallet + solominer)"
echo "[7] UPDATE  Wolf's poolminer"
echo "[8] UPDATE  Everything"
echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"

#Cases
read NUM

########################
#Boost 1.55 Installation
########################

if [[ $NUM == "1" || $NUM == "3" ]]; then

    echo "You are about to install Boost 1.55."
    echo "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~"
    echo "Do you want to install it from the repositories or let the scipt do an automated manual build? Installation over repositories (recommended)   [y/n]? Saying no will do an automated full build."
    read a
    if [[ $a == "Y" || $a == "y" ]]; then

        #Adding PPA and installing boost
        sudo add-apt-repository -y ppa:boost-latest/ppa
        sudo apt-get update
        sudo apt-get -y install libboost1.55-all-dev

    else

        # simple search to get and grab the files required
        sudo apt-get update
        sudo apt-get -y install python-dev autotools-dev libicu-dev build-essential libbz2-dev

        #Downloading boost. Change Link if you want a different version
        echo "Downloading boost"
        cd ~
        wget -O boost_1_55_0.tar.gz http://sourceforge.net/projects/boost/files/boost/1.55.0/boost_1_55_0.tar.gz/download

        #Extracting boost
        echo "Extracting boost"
        tar xzvf boost_1_55_0.tar.gz
        cd boost_1_55_0/

        # boost's bootsrap setup
        ./bootstrap.sh --prefix=/usr/local

        # If we want MPI then we need to set the flag in the user-config.jam file
        user_configFile=`find $PWD -name user-config.jam`
        echo "using mpi ;" >> $user_configFile

        # Find the number of available hardware threads
        n=$(nproc)

        # Install boost in parallel
        if [$n !== 1]
        then
            $n = $n / 2
            sudo ./b2 --with=all -j $n install
        else
            sudo ./b2 --with=all install
        fi

        # Reset the ldconfig, assumes you have /usr/local/lib setup already. Else you can add it to your LD_LIBRARY_PATH, running this anyway
        # will not hurt.
        sudo ldconfig
        echo "Boost installation complete."

    fi
fi

############################################################
#Installation of monero and other requirements besides boost
############################################################


if [[ $NUM == "1" || $NUM == "3" || $NUM == "6" || $NUM == "8" ]]; then

    echo "You are about to install the Monero essentials. If you want to configure it, read this script first. Do you wish to continue  [y/n]?"

    cd ~

    #relinking symlinks for gcc and g++
    sudo cp /usr/bin/gcc /usr/bin/gcc.oldsymlink
    sudo rm /usr/bin/gcc
    sudo ln -s /usr/bin/gcc-4.8 /usr/bin/gcc

    sudo cp /usr/bin/g++ /usr/bin/g++.oldsymlink
    sudo rm /usr/bin/g++
    sudo ln -s /usr/bin/g++-4.8 /usr/bin/g++

    # need these libs (added by TheKoziTwo, 1st March 2015)
    sudo apt-get -y install libssl-dev
    sudo apt-get -y install libevent-dev

    #Cloning github project
    echo "Downloading Monero essentials"
    if [[ $NUM == "6" || $NUM == "8" ]]; then
        cd ~/bitmonero/
        git pull
    else
        cd ~
        git clone git://github.com/monero-project/bitmonero.git
    fi

    # Find the number of available hardware threads
    n=$(nproc)

    #Setting compilation update
    cd ./bitmonero
    mkdir ./build

    #Decision to compile tests
    echo "Do you want to compile tests too? This subdirectory is related to not yet implemented features, which need further testing.
        Not installing it will significantly speed up your compilation time. Do you want to install it  [y/n]?"
    if [[ $a == "Y" || $a == "y" ]]; then
       sed -i '/^add_subdirectory(tests)$/d' CMakeLists.txt
    fi

    #Building with maximum number of cores
    if [$n !== 1]
    then
        $n = $n / 2
        make -j $n
    else
        make
    fi

    #linking symlinks back to old gcc/g++ versions
    sudo rm /usr/bin/gcc
    sudo cp /usr/bin/gcc.oldsymlink /usr/bin/gcc
    sudo rm /usr/bin/gcc.oldsymlink

    sudo rm /usr/bin/g++
    sudo cp /usr/bin/g++.oldsymlink /usr/bin/g++
    sudo rm /usr/bin/g++.oldsymlink


    echo "Monero installation complete"

    ##############################
    #Downloading latest blockchain
    ##############################

    cd ~
    echo "Do you want to download the latest blockchain (atm only 64bit. 64bit and 32bit are not compatible)    [y/n]?"
    read x
        if [[ $x == "N" || $x == "n" ]]; then
        echo "You choosed no"
    else
        #Creating directory
        mkdir ~/.bitmonero/
        cd ~/.bitmonero/
        rm -f blockchain.bin

        #Downloading blockchain
        wget -O blockchain.bin http://monero.cc/downloads/blockchain/linux/blockchain.bin

        echo "Download completed"
    fi
fi

#############################################################
#Installing Wolf's CPUMiner. A fast pool miner utilizing AES
#############################################################

if [[ $NUM == "2" || $NUM == "3" || $NUM == "7" || $NUM == "8" ]]; then

    echo "The following part will build CPUMiner. CPUMiner supports pool mining for multiple algos, including CryptoNight. Do you want to build it now  [y/n]?"

    cd ~

    #Installing required packages
    echo "Installing required packages"
    sudo apt-get install -y automake libcurl4-openssl-dev pkg-config
    sudo apt-get update

    #Preparing
    cd ~/monero
    rm -rf cpuminer
    mkdir cpuminer
    cd cpuminer

    #Building CPUMiner
    if [[ $NUM == "7" || $NUM == "8" ]]; then
        pushd cpuminer-multi
        git pull
    else
        git clone https://github.com/wolf9466/cpuminer-multi
        pushd cpuminer-multi
    fi

    ./autogen.sh
    export CFLAGS="-march=native"
    ./configure

    #Building with maximum number of cores
    n=$(nproc)
    if [$n !== 1]
    then
        $n = $n / 2
        make -j $n
    else
        make
    fi

    #Unsetting flag and leaving dir
    unset CFLAGS
    popd

    echo "Finished building"
fi

echo "The script has finished"