PEM - Added content as per PEM-4835

product_docs/docs/pem/9/troubleshooting.mdx

@@ -135,3 +135,15 @@ When connecting to a PostgreSQL server, you might get one of these error message
     For more information, see the PostgreSQL documentation about [client authentication](http://www.postgresql.org/docs/current/interactive/client-authentication.html).
 
 - **FATAL: password authentication failed**: The `password authentication failed for user` error message indicates there might be a problem with the password you entered. Retry the password to confirm you entered it correctly. If the error message returns, make sure that you have the correct password, that you are authorized to access the server, and that the access was correctly configured in the server's `postgresql.conf` configuration file.
+
+## PEM web server status check
+
+Run this command to check whether the PEM webserver is up and running:
+
+```shell
+curl https://<SERVER_ADDR>:8443/pem/misc/ping -k -i
+__OUTPUT__
+PING
+```
+
+Where, `SERVER_ADDR` is the IP address of your PEM server. The output `PING` confirms the PEM web server is up and running.