bundle command not found in linux debian

When i enter bundle install I get the error '-bash: bundle: command not found'.

How do I find whether bundler is installed ?

gem environment returns the following

RubyGems Environment:
  - RUBYGEMS VERSION: 1.2.0
  - RUBY VERSION: 1.8.7 (2008-08-11 patchlevel 72) [x86_64-linux]
  - INSTALLATI开发者_运维技巧ON DIRECTORY: /var/lib/gems/1.8
  - RUBY EXECUTABLE: /usr/bin/ruby1.8
  - EXECUTABLE DIRECTORY: /var/lib/gems/1.8/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /var/lib/gems/1.8
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :benchmark => false
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - http://gems.rubyforge.org/

Can somebody explains me how to get the bundler command working ? I am a novice to this subject..

gem install bundler

or probably, since there is an executable

sudo gem install bundler

In addition to installing

gem install bundler

you need to put the gem installation directory in your path on Debian 11.04 with gems v1.8 I used

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