Lots of error in Ubuntu 14.04

[andrew-hc]

When I type jekyll serve I get

/var/lib/gems/1.9.1/gems/execjs-2.6.0/lib/execjs/runtimes.rb:48:in autodetect': Could not find a JavaScript runtime. See https://github.com/rails/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable) from /var/lib/gems/1.9.1/gems/execjs-2.6.0/lib/execjs.rb:5:inmodule:ExecJS'
from /var/lib/gems/1.9.1/gems/execjs-2.6.0/lib/execjs.rb:4:in <top (required)>' from /var/lib/gems/1.9.1/gems/coffee-script-2.4.1/lib/coffee_script.rb:1:inrequire'
from /var/lib/gems/1.9.1/gems/coffee-script-2.4.1/lib/coffee_script.rb:1:in <top (required)>' from /var/lib/gems/1.9.1/gems/coffee-script-2.4.1/lib/coffee-script.rb:1:inrequire'
from /var/lib/gems/1.9.1/gems/coffee-script-2.4.1/lib/coffee-script.rb:1:in <top (required)>' from /var/lib/gems/1.9.1/gems/jekyll-coffeescript-1.0.1/lib/jekyll-coffeescript.rb:2:inrequire'
from /var/lib/gems/1.9.1/gems/jekyll-coffeescript-1.0.1/lib/jekyll-coffeescript.rb:2:in <top (required)>' from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll/deprecator.rb:46:inrequire'
from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll/deprecator.rb:46:in block in gracefully_require' from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll/deprecator.rb:44:ineach'
from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll/deprecator.rb:44:in gracefully_require' from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/lib/jekyll.rb:166:in<top (required)>'
from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/bin/jekyll:6:in require' from /var/lib/gems/1.9.1/gems/jekyll-2.5.3/bin/jekyll:6:in<top (required)>'
from /usr/local/bin/jekyll:23:in load' from /usr/local/bin/jekyll:23:in

'

[bdekk]

could you try: bundle exec jekyll serve and see what happens?

[mkasberg]

+1 to bundle exec jekyll serve; see my comment on #5.