Elasticsearch Installation on Ubuntu

Prerequisites

Update system and install dependencies:

apt-get update
apt-get install python-minimal
apt-get install openjdk-8-jdk

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Installation Steps

1. Download Elasticsearch

wget https://download.elastic.co/elasticsearch/release/org/elasticsearch/distribution/deb/elasticsearch/2.4.0/elasticsearch-2.4.0.deb

2. Install Package

dpkg -i elasticsearch-2.4.0.deb

3. Configure Elasticsearch

cd /etc/elasticsearch
vim elasticsearch.yml

Update network.host with the private IP of your server:

network.host: <private-ip>

4. Start Service

service elasticsearch start
service elasticsearch status

5. Verify Installation

curl <ip>:9200/

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Quick Reference

Task	Command
Start service	service elasticsearch start
Stop service	service elasticsearch stop
Check status	service elasticsearch status
View logs	tail -f /var/log/elasticsearch/*.log
Test connection	curl localhost:9200/

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Configuration Tips

• Memory: Set heap size in /etc/elasticsearch/jvm.options
• Cluster: Configure cluster.name for multi-node setups
• Security: Enable X-Pack or configure firewall rules