Hi I have installed ruby 2.1.0 in my droplet, but when I am trying to install passenger-install-apache2-module, I am getting following exception. I have already swapped my memory twice, but I am getting same exception again and again. Please help me out In file included from ext/boost/bind/bind.hpp:29:0, from ext/boost/bind.hpp:22, from ext/boost/thread/detail/thread.hpp:29, from ext/boost/thread/thread_only.hpp:22, from ext/boost/thread/thread.hpp:12, from ext/boost/thread.hpp:13, from ext/common/agents/HelperAgent/Main.cpp:45: ext/boost/bind/arg.hpp: In constructor ‘boost::arg::arg(const T&)’: ext/boost/bind/arg.hpp:37:22: warning: typedef ‘T_must_be_placeholder’ locally defined but not used [-Wunused-local-typedefs] typedef char T_must_be_placeholder[ I == is_placeholder::value? 1: -1 ]; ^ c++: internal compiler error: Killed (program cc1plus) Please submit a full bug report, with preprocessed source if appropriate. See for instructions. rake aborted! ----------------------------------------------- Your compiler failed with the exit status 4. This probably means that it ran out of memory. To solve this problem, try increasing your swap space: https://www.digitalocean.com/community/articles/how-to-add-swap-on-ubuntu-12-04 Tasks: TOP => apache2 => buildout/agents/PassengerHelperAgent (See full trace by running task with --trace) -------------------------------------------- It looks like something went wrong Please read our Users guide for troubleshooting tips: /usr/local/lib/ruby/gems/2.1.0/gems/passenger-4.0.41/doc/Users guide Apache.html http://www.modrails.com/documentation/Users%20guide%20Apache.html If that doesn't help, please use our support facilities. We'll do our best to help you. http://www.phusionpassenger.com/support