First time rails install, help with gems

Hello all,
I just installed ruby enterprise edition with rails. I down loaded
the
latest version of gems and ran

dan@dev:~/initial_install/rubygems-1.3.5$ sudo ruby setup.rb
Which returned:

RubyGems 1.3.5 installed
./lib/rubygems/custom_require.rb:31:in `gem_original_require': no such 
file
to load -- rdoc/rdoc (LoadError)
        from ./lib/rubygems/custom_require.rb:31:in `require'
        from ./lib/rubygems/commands/setup_command.rb:352:in `run_rdoc'
        from ./lib/rubygems/commands/setup_command.rb:247:in 
`install_rdoc'
        from ./lib/rubygems/commands/setup_command.rb:120:in `execute'
        from ./lib/rubygems/command.rb:257:in `invoke'
        from ./lib/rubygems/command_manager.rb:132:in `process_args'
        from ./lib/rubygems/command_manager.rb:102:in `run'
        from ./lib/rubygems/gem_runner.rb:58:in `run'
        from setup.rb:35                    [/CODE]

Then I tried to install the mysql gem and  got the following out put:
[CODE]dan@dev:~/initial_install/rubygems-1.3.5$ gem install mysql
WARNING:  Installing to ~/.gem since /usr/lib/ruby/gems/1.8 and
          /usr/bin aren't both writable.
WARNING:  You don't have /home/dan/.gem/ruby/1.8/bin in your PATH,
          gem executables will not run.
Building native extensions.  This could take a while...
ERROR:  Error installing mysql:
        ERROR: Failed to build gem native extension.

/usr/bin/ruby1.8 extconf.rb
extconf.rb:10:in `require': no such file to load -- mkmf (LoadError)
        from extconf.rb:10


Gem files will remain installed in 
/home/dan/.gem/ruby/1.8/gems/mysql-2.8.1
for inspection.
Results logged to
/home/dan/.gem/ruby/1.8/gems/mysql-2.8.1/ext/mysql_api/gem_make.out

What an I missing here?

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Hi,
As you want to install ruby on rails on linux system. so refer this
url
http://wiki.rubyonrails.org/getting-started/installation/linux

can you tell the Os you using on which you wanna intsall it

On Fri, Feb 19, 2010 at 3:29 PM, Priyanka P.
[email protected]wrote:

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Thanks:
Rajeev sharma