Bundler: Command not found

I am hosting on a vps, ubuntu 10.04, rails 3, ruby and mysql installed correctly by following some tutorials. If I run bundle check or bundle install I get the error '-bash: bundle: command not found'. From gem list --local I see 'bundler (1.0.2, 1.0.0)' is installed.

I don't know what's going wrong...

gem environment returns:

 RubyGems Environment:
  - RUBYGEMS VERSION: 1.3.7
  - RUBY VERSION: 1.8.7 (2010-04-19 patchlevel 253) [i686-linux]
  - INSTALLATION DIRECTORY: /opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8
  - RUBY EXECUTABLE: /opt/ruby-enterprise-1.8.7-2010.02/bin/ruby
  - EXECUTABLE DIRECTORY: /opt/ruby-enterprise-1.8.7-2010.02/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86-linux
  - GEM PATHS:
     - /opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8
     - /root/.gem/ruby/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://rubygems.org/

and echo $PATH returns:

/opt/myruby/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/bin/gem:/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/gems/:/root/.gem/ruby/1.8

and which gem returns:

/usr/bin/gem

locate bundle returns:

/opt/ruby-enterprise-1.8.7-2010.02/lib/ruby/gems/1.8/

My problem was that I did:

sudo gem install bundler

So I had installed as root rather than as myself. So I uninstalled as root, then installed as myself:

sudo gem uninstall bundler
gem install bundler
rbenv rehash

(last command for if you are using rbenv)

And it worked. The "correct" path was in .bashrc (or other shell profile), at least according to

$PATH
=> zsh: /Users/myself/.rbenv/shims:/Users/myself/.rbenv/bin: ... etc

but it was expecting it to be installed for myself - not for root. In my case, its rightful installation place is in ~/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/bundler

You need to add the ruby gem executable directory to your path

export PATH=$PATH:/opt/ruby-enterprise-1.8.7-2010.02/bin

... also for Debian GNU/Linux 6.0 :)

export PATH=$PATH:/var/lib/gems/1.8/bin