In case you have upgraded elastic search by mistake and want to rollback to the previous working version, here are the steps. In my case, I upgraded the ElasticSearch to 7.9.2-1 and wanted to rollback to 7.6.2-1 1. yum downgrade elasticsearch-7.6.2-1 2. Restart elasticsearch sudo service elasticsearch start I hope it will work but in case you are facing any of the following issues, please run respective comments. Errors: Problem . Unable to create temporary keystore at [/etc/elasticsearch/elasticsearch.keystore.tmp] Solution : sudo -u elasticsearch -s /usr/share/elasticsearch/bin/elasticsearch-keystore create Problem : Likely root cause: java.nio.file.AccessDeniedException: /etc/elasticsearch Solution : chmod g+w /etc/elasticsearch Thanks!! Enjoy Programming! Reference Links ==================================== https://discuss.elastic.co/t/unable-to-create-temporary-keystore-at-etc-elasticsearch-elasticsearch-keystore-tmp/136411