diff --git a/TestON/install.sh b/TestON/install.sh
index 4bbfe92..0327ca7 100755
--- a/TestON/install.sh
+++ b/TestON/install.sh
@@ -8,96 +8,234 @@
 # Fail on unset var usage
 set -o nounset
 
-# Identify Linux release
-DIST=Unknown
-RELEASE=Unknown
-CODENAME=Unknown
+function init {
+    # Identify Linux release
+    DIST=Unknown
+    RELEASE=Unknown
+    CODENAME=Unknown
 
-ARCH=`uname -m`
-if [ "$ARCH" = "x86_64" ]; then ARCH="amd64"; fi
-if [ "$ARCH" = "i686" ]; then ARCH="i386"; fi
+    ARCH=`uname -m`
+    if [ "$ARCH" = "x86_64" ]; then ARCH="amd64"; fi
+    if [ "$ARCH" = "i686" ]; then ARCH="i386"; fi
 
-if [ -e /etc/debian_version ]; then DIST="Debian"; fi
-if [ -e /etc/fedora-release ]; then DIST="Debian"; fi
-grep Ubuntu /etc/lsb-release &> /dev/null && DIST="Ubuntu"
+    if [ -e /etc/debian_version ]; then DIST="Debian"; fi
+    if [ -e /etc/fedora-release ]; then DIST="Debian"; fi
+    grep Ubuntu /etc/lsb-release &> /dev/null && DIST="Ubuntu"
 
-if [ "$DIST" = "Ubuntu" ] || [ "$DIST" = "Debian" ]; then
-    install='sudo apt-get -y install'
-    remove='sudo apt-get -y remove'
-    pipinstall='sudo pip install'
-    # Prereqs for this script
-    if ! which lsb_release &> /dev/null; then
-        $install lsb-release
+    if [ "$DIST" = "Ubuntu" ] || [ "$DIST" = "Debian" ]; then
+        install='sudo apt-get -y install'
+        remove='sudo apt-get -y remove'
+        pipinstall='sudo pip install'
+        # Prereqs for this script
+        if ! which lsb_release &> /dev/null; then
+            $install lsb-release
+        fi
     fi
-fi
 
-if [ "$DIST" = "Fedora" ]; then
-    install='sudo yum -y install'
-    remove='sudo yum -y erase'
-    pipinstall='sudo pip install'
-    # Prereqs for this script
-    if ! which lsb_release &> /dev/null; then
-        $install redhat-lsb-core
+    if [ "$DIST" = "Fedora" ]; then
+        install='sudo yum -y install'
+        remove='sudo yum -y erase'
+        pipinstall='sudo pip install'
+        # Prereqs for this script
+        if ! which lsb_release &> /dev/null; then
+            $install redhat-lsb-core
+        fi
     fi
-fi
-if which lsb_release &> /dev/null; then
-    DIST=`lsb_release -is`
-    RELEASE=`lsb_release -rs`
-    CODENAME=`lsb_release -cs`
-fi
-echo "Detected Linux distribution: $DIST $RELEASE $CODENAME $ARCH"
+    if which lsb_release &> /dev/null; then
+        DIST=`lsb_release -is`
+        RELEASE=`lsb_release -rs`
+        CODENAME=`lsb_release -cs`
+    fi
+    echo "Detected Linux distribution: $DIST $RELEASE $CODENAME $ARCH"
 
-if ! echo $DIST | egrep 'Ubuntu|Debian|Fedora'; then
-    echo "Install.sh currently only supports Ubuntu, Debian and Fedora."
-    exit 1
-fi
+    if ! echo $DIST | egrep 'Ubuntu|Debian|Fedora'; then
+        echo "Install.sh currently only supports Ubuntu, Debian and Fedora."
+        exit 1
+    fi
 
-# Check OnosSystemTest is cloned in home directory.
-if [ ! -d ~/OnosSystemTest ]; then
-    echo "Could not find OnosSystemTest in your home directory."
-    echo "Exiting from running install script."
-    exit 1
-fi
+    #Get location of TestON dir
+    SOURCE="${BASH_SOURCE[0]}"
+    while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+        DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+        SOURCE="$(readlink "$SOURCE")"
+        [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+    done
+    DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+    echo "Found TestON at $DIR"
+}
 
-# Install TestON dependencies
-echo "Installing TestON dependencies"
-if [ "$DIST" = "Fedora" ]; then
-    # Fedora may have vlan enabled by default. Still need to confirm and update later
-    $install python-pip build-essential python-dev pep8 python3-requests
-    $pipinstall pexpect==3.2 configobj==4.7.2 numpy
+function requirements {
+    system_reqs
+    python_reqs
+}
+
+function system_reqs {
+    # Specify a specific command with $1
+    set +o nounset
+    if [ -z $1 ]
+    then
+        cmd=$install
+    else
+        cmd=$1
+    fi
+    set -o nounset
+    # Install TestON dependencies
+    echo "Installing TestON dependencies"
+    if [ "$DIST" = "Fedora" ]; then
+        # Fedora may have vlan enabled by default. Still need to confirm and update later
+        $cmd python-pip build-essential python-dev pep8 python3-requests
+    else
+        $cmd python-pip build-essential python-dev pep8 vlan python3-requests
+    fi
+
+    # Some Distos have this already from another package
+    if which arping > /dev/null ; then
+        echo "Arping command detected, skipping package installation."
+    else
+        $cmd arping
+    fi
+}
+
+function python_reqs {
+    # Specify a specific pip command with $1
+    set +o nounset
+    if [ -z $1 ]
+    then
+        cmd=$pipinstall
+    else
+        cmd=$1' install'
+    fi
+    set -o nounset
+    $cmd -r requirements.txt
+}
+
+function symlinks {
+    set +e
+    # Add symbolic link to main TestON folder in Home dir
+    pushd ~
+    sudo ln -s $DIR && echo "Added symbolic link to TestON folder in HOME directory."
+    popd
+
+    # Add symbolic link to TestON cli in /usr/local/bin
+    pushd /usr/local/bin
+    sudo ln -s $DIR/bin/cli.py teston && echo "Added symbolic link to TestON CLI in /usr/local/bin."
+    popd
+
+    # Add symlink to get bash completion
+    pushd /etc/bash_completion.d
+    sudo cp $DIR/bin/.teston_completion teston_completion
+    echo "Bash completion will now be enabled for new shells"
+    popd
+    set -e
+}
+
+function git {
+    # OnosSystemTest git pre-commit hooks
+    pushd $DIR/..
+    cp .git/hooks/pre-commit.sample .git/hooks/pre-commit
+    popd
+}
+
+function get_pypy {
+    echo "Getting pypy"
+    pushd ~
+    if [ ! -e pypy2-v5.3.1-linux64.tar.bz2 ]
+    then
+        wget https://bitbucket.org/pypy/pypy/downloads/pypy2-v5.3.1-linux64.tar.bz2
+    fi
+    tar xf pypy2-v5.3.1-linux64.tar.bz2
+    python_impl=~/pypy2-v5.3.1-linux64/bin/pypy
+    popd
+    venv $python_impl "venv-teston-pypy"
+}
+
+# Optionally install in virtual env
+function venv {
+    # $1 is the path to python implementation, $2 is the venv-name
+    echo "Installing virtual env for TestON..."
+    pushd $DIR
+    set +o nounset
+    if [ -z "$2" ]
+    then
+        venv_name="venv-teston"
+    else
+        venv_name=$2
+    fi
+    pip install virtualenv
+
+    # Setup virtual env
+    if [ -z "$1" ]; then
+        echo "No python implementation specified for virtual env, using default."
+        virtualenv $venv_name
+    else
+        python_impl=$1
+        echo "Using $python_impl for python in virtual env."
+        virtualenv -p $python_impl $venv_name
+    fi
+    python_reqs $venv_name/bin/pip
+    set -o nounset
+    popd
+}
+
+
+function default {
+    requirements
+    symlinks
+    git
+}
+
+function finished {
+    echo ""
+    echo "Completed running install.sh script"
+    echo "Run TestON CLI by typing teston at bash prompt"
+    echo "Example: teston run <TestSuite Name>"
+}
+
+# TODO Add log rotation configuration for TestON logs here (place holder)
+# TODO Add bash tab completion script to this
+
+function usage {
+    printf "Usage: $(basename $0) [-dgprsv] \n"
+    printf "Usage: $(basename $0) -y [PATH] \n\n"
+    printf "This install script attempts to install deoendencies needed to run teston\n"
+    printf "and any tests included in the official repository. If a test still does \n"
+    printf "not run after running this script, you can try looking at the test's README\n"
+    printf "or the driver files used by the tests. There are some software components\n"
+    printf "such as software switches that this script does not attempt to install as\n"
+    printf "they are more complicated.\n\n"
+
+    printf "Options:\n"
+    printf "\t -d (default) requirements, symlinks and git hooks\n"
+    printf "\t -g install git hooks\n"
+    printf "\t -p install pypy in a virtual env\n"
+    printf "\t -r install requirements for TestON/tests\n"
+    printf "\t -s install symlinks\n"
+    printf "\t -v install a python virtual environment for teston using the default python implementation\n"
+    printf "\t -y <PATH> install a python virtual environment for testonusing a specific python implementation at PATH.\n"
+
+}
+
+if [ $# -eq 0 ]
+then
+    default
+elif [ $1 == "--help" ]
+then
+    usage
 else
-    $install python-pip build-essential python-dev pep8 vlan python3-requests
-    $pipinstall pexpect==3.2 configobj==4.7.2 numpy
+    init
+    while getopts 'dgprsvy:' OPTION
+    do
+      case $OPTION in
+      d)    default;;
+      g)    git;;
+      p)    get_pypy;;
+      r)    requirements;;
+      s)    symlinks;;
+      v)    venv;;
+      y)    venv  $OPTARG;;
+      ?)    usage;;
+      esac
+  done
+  shift $(($OPTIND -1))
+  finished
 fi
-
-# Some Distos have this already from another package
-if which arping > /dev/null ; then
-    echo "Arping command detected, skipping package installation."
-else
-    $install arping
-fi
-
-# Add check here to make sure OnosSystemTest is cloned into home directory (place holder)
-
-# Add symbolic link to main TestON folder in Home dir
-pushd ~
-sudo ln -s ~/OnosSystemTest/TestON TestON
-echo "Added symbolic link to TestON folder in HOME directory."
-popd
-
-# OnosSystemTest git pre-commit hooks
-pushd ~/OnosSystemTest
-cp .git/hooks/pre-commit.sample .git/hooks/pre-commit
-popd
-
-# Add symbolic link to TestON cli in /usr/local/bin
-pushd /usr/local/bin
-sudo ln -s $HOME/OnosSystemTest/TestON/bin/cli.py teston
-echo "Added symbolic link to TestON CLI in /usr/local/bin."
-popd
-
-# Add log rotation configuration for TestON logs here (place holder)
-
-echo "Completed running install.sh script"
-echo "Run TestON CLI by typing teston at bash prompt"
-echo "Example: teston run <TestSuite Name>"