Amazon Cloud
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Amazon Cloud is the place where you can create a number of ec2 instances in a Virtual Private Cloud.
You can get the complete documentation in the link http://docs.aws.amazon.com/AmazonVPC/latest/GettingStartedGuide/ExerciseOverview.html.
Here I am listing some commands usefull to check varrious things in an amazon instance
Once you launched an ec2 instance in an VPC , there will be a default path where amazon API tools are located. The default path on my instances are is /opt/amazon/api-tool/bin/
1) How to check if an elastic ip is attached on the machine or not
GET http://169.254.169.254/latest/meta-data/public-ipv4
It will list the elastic ip on the amazon
2)To list the instance information of all machines on the amazon
ec2-describe-instances -K ~/.ec2/*.key -C ~/.ec2/*.crt
it need amazon keys to work
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