How to run a code in an Amazone's EC2 instance?

Question

I understand nearly nothing to the functioning of EC2. I created an Amazon Web Service (AWS) account. Then I launched an EC2 instance.

And now I would like to execute a Python code in this instance, and I don't know how to proceed. Is it necessary to load the code somewhere in the instance? Or in Amazon's S3 and to link it to the instance?

Where is there a guide that explain the usages of instance that are possible? I feel like a man before a flying saucer's dashboard without user's guide.

Answer 1

Here's a very simple procedure to move your Python script from local to EC2 Instance and run it.

> 1. scp -i <filepath to Pem> <filepath to Py File> ec2-user@<Public DNS>.compute-1.amazonaws.com:<filepath in EC2 instance where you want > your file to be> > 2. Cd to to the directory in EC2 containing the file. Type Python <Filename.py> There it executed. 

Here's a concrete examples for those who likes things shown step-by-step:

1. In your local directory, create a python script with the following code: print("Hello AWS")
2. Assuming you already have AWS already set up and you want to run this script in EC2, you need to SCP (Secure Copy Protocol) your file to a directory in EC2. So here's an example:

- My filepath to pem is ~/Desktop/random.pem.
- My filepath to py file is ~/Desktop/hello_aws.py
- My public DNS is ec22-34-12-888
- The ec2 directory where I want my script to be is in /home/ec2-user
- So the full command I run in my local terminal is:

scp -i ~/Desktop/random.pem ~/Desktop/hello_aws.py [email protected]:/home/ec2-user

3. Now ssh to your ec2 instance, cd to /home/ec2-user (Or wherever you put your file) and Python hello_aws.py