title: Can't see the binary after installing ruby gem: memcached
body: <p>I need to install and run memcached for an application. I have my own ruby installation on a linux machine I am not a super-user of.</p>
  
  <p>My ruby installation is in ~/ruby-install which also has the ruby-gem binary installed. Now, from here, when I do a `gem install memcached', I do not see any error and it seems that the gem installation went well.</p>
  
  <p>However, I'm a bit puzzled as to what post-install environment setup should I do to get the memcached commandline working?</p>