I am going to install Graylog server 2.3 in Ubuntu 14. For graylog setup we need to install following Mongo DB and ElasticSearch. First install oracle jdk 8 sudo apt-get install python-software-properties sudo add-apt-repository ppa:webupd8team/java sudo apt-get update Oracle JDK 8 : sudo apt-get install oracle-java8-installer To check : $ java -version Next Elasticsearch : From graylog 2.3 it is supporting elasticsearch 5.X Download and install the Debian package $wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.5.0.deb $sha1sum elasticsearch-5.5.0.deb $sudo dpkg -i elasticsearch-5.5.0.deb $sudo update-rc.d elasticsearch defaults 95 10 Elasticsearch can be started and stopped using the service command: $sudo -i service elasticsearch start $sudo -i service elasticsearch stop Install MongoDB Import the public key used by the package management system $sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 0C49F3730359A14518585931BC711F9BA15703C6 Cre