Elastic Search 1.4.2 with Oracle Java 8

ElasticSearch.sh

### Install Oracle Java 8, this means you agree to their binary license!!
cd ~
sudo add-apt-repository -y ppa:webupd8team/java
sudo apt-get update
echo debconf shared/accepted-oracle-license-v1-1 select true | sudo debconf-set-selections
echo debconf shared/accepted-oracle-license-v1-1 seen true | sudo debconf-set-selections
sudo aptitude -y install oracle-java8-installer


### Download and Install ElasticSearch
### Check http://www.elasticsearch.org/download/ for latest version of ElasticSearch and replace wget link below
wget https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.4.2.deb
sudo dpkg -i elasticsearch-1.4.2.deb

#enable on bootup
sudo update-rc.d elasticsearch defaults 95 10
 
### Start ElasticSearch 
sudo /etc/init.d/elasticsearch start

### Make sure service is running
curl http://localhost:9200

### Should return something like this:
#{
#  "status" : 200,
#  "name" : "Storm",
#  "version" : {
#    "number" : "1.3.1",
#    "build_hash" : "2de6dc5268c32fb49b205233c138d93aaf772015",
#    "build_timestamp" : "2014-07-28T14:45:15Z",
#    "build_snapshot" : false,
#    "lucene_version" : "4.9"
#  },
#  "tagline" : "You Know, for Search"
#}


#You will want to tune your memory as well http://stackoverflow.com/a/18152957/56069

In the command "sudo update-rc.d elasticsearch defaults 95 10" is there a reason for choosing those numbers? I want to run Elasticsearch along with Cerebro (github.com/lmenezes/cerebro) as services on the same machine and I want both to start on bootup... Should I use the same numbers for Cerebro? I've been searching, but don't get the meaning.

Thanks.