@Vivian Li See this in the link that you shared 1. ssh into the VM and run the following command as the root user:ambari-admin-password-reset 2. You will be prompted to enter the password. Ambari server will restart. 3. Then run command ambari-agent restart 4. You can then go to the http://<hostname/ipaddress>:8888 which displays the splash page and click on the Ambari url. Enter the user "admin" and put the password you set previouly in step 2. You should now be able to log in as an Ambari admin.
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