Install elasticsearch on a fresh Centos6 box

elasticsearch_install.sh

cd ~
sudo yum update
sudo yum install java-1.7.0-openjdk.i686 unzip wget -y

wget http://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-0.20.5.zip -O elasticsearch.zip

export ES_HOME=/opt/elasticsearch

sudo unzip elasticsearch.zip -d $ES_HOME
rm elasticsearch.zip

curl -L http://github.com/elasticsearch/elasticsearch-servicewrapper/tarball/master | tar -xz
mv *servicewrapper*/service $ES_HOME/bin/
rm -Rf *servicewrapper*

sudo useradd -d $ES_HOME -s /bin/sh elasticsearch
mkdir $ES_HOME/lock
sudo chown -R elasticsearch $ES_HOME

echo "RUN_AS_USER=elasticsearch" | cat >> $ES_HOME/bin/service/elasticsearch
echo "LOCKDIR=$ES_HOME/lock" | cat >> $ES_HOME/bin/service/elasticsearch

#vi $ES_HOME/bin/service/elasticsearch
#<EDIT> RUN_AS_USER=elasticsearch
#<EDIT> LOCKDIR=/opt/elasticsearch/lock

sudo $ES_HOME/bin/service/elasticsearch install
sudo /etc/init.d/elasticsearch start

#curl http://localhost:9200