apt-get install -y --force-yes -qq build-essential cmake flex
apt-get install -y --force-yes -qq libpcre++-dev libxerces-c-dev libpcap-dev libboost-all-dev
apt-get install -y --force-yes -qq build-essential cmake flex
apt-get install -y --force-yes -qq libpcre++-dev libxerces-c-dev libpcap-dev libboost-all-dev