title: Error while starting Mongod with config file option
body: <p>I am not able to start mongod servers with replication using config file.
  when issue the command</p>
  
  <blockquote>
    <p>mongod --config /etc/mongod1.conf</p>
  </blockquote>
  
  <p>throws an error-</p>
  
  <blockquote>
    <p>Unrecognized option: replSet</p>
    
    <p>Unrecognized option: oplogSizeMB</p>
  </blockquote>
  
  <p>MongoDB Version: 3.0</p>
  
  <pre><code># mongod.conf
  
  # for documentation of all options, see:
  #   http://docs.mongodb.org/manual/reference/configuration-options/
  
  # where to write logging data.
  systemLog:
    destination: file
    logAppend: true
    path: /var/log/mongodb/mongod.log
  
  # Where and how to store data.
  storage:
    dbPath: /var/lib/mongo/test
    journal:
      enabled: true
  #  engine:
  #  mmapv1:
  #  wiredTiger:
  
  # how the process runs
  processManagement:
    fork: true  # fork and run in background
    pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
  
  # network interfaces
  net:
    port: 27030
  #  bindIp: 127.0.0.1  # Listen to local interface only, comment to listen on all interfaces.
  
  
  #security:
  
  #operationProfiling:
  
  replication:
  replSet: testrep
  oplogSizeMB: 1024
  #sharding:
  
  ## Enterprise-Only Options
  </code></pre>
  
  <p>please help me.</p>