change permissions pem 1

change permissions pem

chmod 400 key.pem

Here is what the above code is Doing:
1. Create a new key pair using the RSA algorithm.
2. Save the private key to a file named key.pem.
3. Save the public key to a file named key.pub.
4. Change the permissions of the private key file so that only the current user can read it.

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