How to change the password of Elasticsearch in Linux? – SearchBlox Help Center

Go to /opt/searchblox/elasticsearch/plugins/opendistro_security/tools
Switch to root user using the command sudo su
You can also run bash hash.sh for the same result.
You will get a prompt for a password, enter the desired password
You will get the hash value for your new password
Copy the hash value and provide it across hash value for admin user in /opt/searchblox/elasticsearch/plugins/opendistro_security/securityconfig/internal_users.yml
Go to /opt/searchblox/elasticsearch/plugins/opendistro_security/tools
Run the following command

bash securityadmin.sh -cd ../securityconfig/ -icl -nhnv -cacert /opt/searchblox/elasticsearch/config/root-ca.pem -cert /opt/searchblox/elasticsearch/config/kirk.pem -key /opt/searchblox/elasticsearch/config/kirk-key.pem

After running the command, your password for elasticsearch will be updated; It is not required to restart elasticsearch.
You can access https://localhost:9200 now and provide the new password for login.
After completing all the elasticsearch related steps mentioned above, update the password in /opt/searchblox/webapps/ROOT/WEB-INF/searchblox.yml
searchblox.basic.password: password@123
Restart SearchBlox for the changes to take effect.

To learn more on Elasticsearch in SearchBlox read: Elasticsearch in SearchBlox