Update 2014-07-14: Fixed permission to prevent error when installing a plugin. Thanks Rob Sharkey. If you get permission error when installing a plugin, run: cd /opt/redmine/current sudo chmod 0775 log sudo chmod -R 0665 log/*.log sudo chown -R www-data:$USER files log tmp public/plugin_assets sudo chmod -R 0775 files log tmp public/plugin_assets  Update 2014-07-12: Added troubleshooting suggestions and … Continue reading Install Redmine 2.5.x on Ubuntu 14.04 with Apache2, RVM and Passenger