title: RVM Installation and permission issue
body: <p>I install RVM  by <a href="http://pragmaticstudio.com/blog/2010/9/23/install-rails-ruby-mac" rel="nofollow">this</a> tutorial and on the step number 4 <code>echo '[[ -s "$HOME/.rvm/scripts/rvm" ]] &amp;&amp; . "$HOME/.rvm/scripts/rvm" ' &gt;&gt; ~/.bash_profile</code> I got this one error</p>
  
  <blockquote>
    <p>-bash: /Users/my_name/.bash_profile: Permission denied</p>
  </blockquote>
  
  <p>I tried it run with the <strong>sudo</strong>, but I am still getting this error</p>