error memcached gem installation

while running bundle install  got the following error for installing  memcached (1.4.1) gem

An error occured while installing memcached (1.4.1), and Bundler cannot continue.
Make sure that `gem install memcached -v '1.4.1'` succeeds before bundling.


solution steps :
1. apt-get install memcached (if still same error then complete step 2 and 3)
2. apt-get install libsasl2-dev
3. /etc/init.d/memcached restart