Permission Denied
Advices to Users
- Please check if your public key & private key are matched and placed in the correct place both in your Jupyter notebook and local machine. 
- Your old key could be cached, please wait 2~15 minutes until the cache becomes invalid and the bastion server will fetch your new key. 
Advices for Admin
- You could also try to refresh the SSH key cache manually if none of above worked.
