ec2

This morning I was about to kickoff some typical jobs with AWS CLI on an Linux EC2 instance. The AWS CLI command always raised the error, 1 2 3 [user@host ~]$ aws s3 ls An error occurred (RequestTimeTooSkewed) when calling the ListBuckets operation: The difference between the request time and the current time is too large. even with the simplest list object command the error were still there!!! By querying Stack Overflow, some people had the same problem with S3 upload, and suggested to compare the local time with Amazon server-side time....

Yesterday when I tried to ssh to remote EMR cluster, it raised this problem 1 2 3 4 5 6 7 8 9 10 11 12 13 14 [ec2-user@ds-uat-airflow1 ~]$ ssh -i ~/YOUR_SECRET.pem hadoop@ip-YOUR_IP_ADDRESS.us-west-2.compute.internal @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY! Someone could be eavesdropping on you right now (man-in-the-middle attack)! It is also possible that a host key has just been changed....