* Postgres 8.3+
* ImageMagick
* Bundler
+* Javascript Runtime
These can be installed on Ubuntu 10.10 or later with:
```
sudo apt-get install ruby1.9.1 libruby1.9.1 ruby1.9.1-dev ri1.9.1 \
- libmagickwand-dev libxml2-dev libxslt1-dev \
+ libmagickwand-dev libxml2-dev libxslt1-dev nodejs \
apache2 apache2-threaded-dev build-essential git-core \
postgresql postgresql-contrib libpq-dev postgresql-server-dev-all \
libsasl2-dev
```
sudo yum install ruby ruby-devel rubygem-rdoc rubygem-bundler rubygems \
- libxml2-devel \
+ libxml2-devel js \
gcc gcc-c++ git \
postgresql postgresql-server postgresql-contrib postgresql-devel \
perl-podlators