Unable to resolve Ruby error (missing psych)

Question

Whenever I run something with Ruby on my server, I get the following error:

/usr/local/rvm/rubies/ruby-1.9.3-p194/lib/ruby/1.9.1/yaml.rb:56:in `

        

Answer 1

The problem could be solved by installing libyaml. Below are the corresponding packages for the most popular distributions:

• Fedora libyaml
• Ubuntu and other Debian based libyaml-dev
• Some other like CentOS libyaml-devel

and also you should install the following to avoid similar problems in future:

ruby-devel libxml2 libxml2-devel libxslt libxslt-devel