Install puppet agent on a running computer/VM

install_puppet_agent.sh

SERVER=foreman

cat > /etc/apt/sources.list.d/puppetlabs.list << EOF
deb http://apt.puppetlabs.com trusty main
deb-src http://apt.puppetlabs.com trusty main

deb http://apt.puppetlabs.com trusty dependencies
deb-src http://apt.puppetlabs.com trusty main dependencies
EOF
apt-get update
apt-get install -y --force-yes puppet

if [ -e /etc/default/puppet ]; then
  sed -i "s/START=no/START=yes/" /etc/default/puppet
fi
cat >> /etc/puppet/puppet.conf << EOF
[agent]
server=$SERVER
runinterval=180
EOF
puppet agent --enable
service puppet restart