dwweb0309

http://localhost:9200/_cat/indices/.kibana*?v=true&s=index

And delete kibana related indexes one by one

curl -XDELETE http://localhost:9200/.kibana_8.7.1_001

And resart kibana server

dwweb0309

• See latest lines from systemd service log

  journalctl -u <service_name> [-e] [-f]
  

-f specifies that you'd like to follow the log as it changes

dwweb0309

Question 1

Javascript function indexOf returns -1 if there is no match in the string, not a falsy value. The following code can resolve the issue.

function validateString(str) {
  if (str.toLowerCase().indexOf('superman') === -1) {
    throw new Error('String does not contain superman');
  }    
}