rails session questions?

Question

i run my rails program in linux , then i shutdown , after i run it agian, server report session are expired,

Answer 1

You can defined the timespan after which a session expires in config/initializers/session_store.rb

ActionController::Base.session = {
  :key         => '_myapp_session',
  :secret      => '23fd...11b3d84682ec',
  :expire_after => 1.month
}

Answer 2

If you want to set the duration of a session:

ActionController::Base.session_options[:expire_after]=2.years

Anyway this guide will be of some help