# yum install gcc openssl-devel
# wget http://launchpad.net/plone/4.0/4.0.4/+download/Plone-4.0.4-UnifiedInstaller.tgz
# tar zxvf Plone-4.0.4-UnifiedInstaller.tgz
# cd ./Plone-4.0.4-UnifiedInstaller
# ./install.sh
# sudo -u plone /usr/local/Plone/zinstance/bin/plonectl start
# sudo -u plone /usr/local/Plone/zinstance/bin/plonectl stop