installation sur kubuntu 14.04

salut,

est-ce que quelqu'un aurait un bon tuto pour l'installation de cette dernière version?

car j'ai suivi celui-là mais il y a des choses qui manquent je trouve.

mon "service" Unicorn ne veut pas démarrer et je me retrouve coincer sans solution pour le moment... ça fait une semaine que je cherche :(

pour le moment, j'en suis là =>

 sudo /etc/init.d/unicorn start
 * Starting Unicorn web server unicorn master failed to start, check stderr log for details
 [fail]

le log =>

 I, [2016年10月30日T01:06:39.002502 #8845] INFO -- : Refreshing Gem list
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack.rb:14: warning: already initialized constant Rack::VERSION
 /usr/lib/ruby/vendor_ruby/rack.rb:14: warning: previous definition of VERSION was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:16: warning: already initialized constant Rack::Utils::DEFAULT_SEP
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:51: warning: previous definition of DEFAULT_SEP was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:18: warning: already initialized constant Rack::Utils::KeySpaceConstrainedParams
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:504: warning: previous definition of KeySpaceConstrainedParams was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:157: warning: already initialized constant Rack::Utils::ESCAPE_HTML
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:195: warning: previous definition of ESCAPE_HTML was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:166: warning: already initialized constant Rack::Utils::ESCAPE_HTML_PATTERN
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:204: warning: previous definition of ESCAPE_HTML_PATTERN was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:516: warning: already initialized constant Rack::Utils::HTTP_STATUS_CODES
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:544: warning: previous definition of HTTP_STATUS_CODES was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:579: warning: already initialized constant Rack::Utils::STATUS_WITH_NO_ENTITY_BODY
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:610: warning: previous definition of STATUS_WITH_NO_ENTITY_BODY was here
 /var/lib/gems/2.2.0/gems/rack-2.0.1/lib/rack/utils.rb:581: warning: already initialized constant Rack::Utils::SYMBOL_TO_STATUS_CODE
 /usr/lib/ruby/vendor_ruby/rack/utils.rb:612: warning: previous definition of SYMBOL_TO_STATUS_CODE was here
 /home/diaspora/diaspora/config/application.rb:4:in `<top (required)>': undefined method `settings' for Bundler:Module (NoMethodError)
 from /home/diaspora/diaspora/config/environment.rb:2:in `require_relative'
 from /home/diaspora/diaspora/config/environment.rb:2:in `<top (required)>'
 from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
 from /usr/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
 from config.ru:8:in `block in <main>'
 from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `instance_eval'
 from /usr/lib/ruby/vendor_ruby/rack/builder.rb:55:in `initialize'
 from config.ru:1:in `new'
 from config.ru:1:in `<main>'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/lib/unicorn.rb:56:in `eval'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/lib/unicorn.rb:56:in `block in builder'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:752:in `call'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:752:in `build_app!'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/lib/unicorn/http_server.rb:129:in `start'
 from /var/lib/gems/2.2.0/gems/unicorn-5.1.0/bin/unicorn:126:in `<top (required)>'
 from /usr/local/bin/unicorn:23:in `load'
 from /usr/local/bin/unicorn:23:in `<main>'

et/ou =>

 sudo /etc/init.d/unicorn_diaspora start
 Starting Diaspora
 /usr/bin/env: /usr/local/bin: Permission non accordée

merci de votre aide ;)