https://indy.fulgan.com/SSL/

Common OpenSSL commands

Keep in mind that .pem and .cer are both the same format - and you may just be able to rename a .pem file to a .cer and vice-versa. If that doesn't give you the desired result, use this command:

openssl x509 -inform der -in certificate.cer -outform pem -out certificate.pem

openssl x509 -outform der -in certificate.pem -out certificate.der

openssl x509 -in cert.crt -out cert.pem

PSCP for Windows – To copy files over an SSH session

To Download pscp (including putty) – 

https://it.cornell.edu/managed-servers/transfer-files-using-putty

To copy the local file c:\….\info.txt as user ec2-user to the server ec2-privateip  with destination directory /var/log, type at the prompt:

pscp c:\...\info.txt ec2-user@privateIP:/var/log/info.txt

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