I assume you want the DER encoded version of your PEM private key.
openssl rsa -outform der -in private.pem -out private.key
openssl rsa -in privkey.pem -out private.key does the job.
How to convert .pem into .key?
I assume you want the DER encoded version of your PEM private key.
openssl rsa -outform der -in private.pem -out private.key
openssl rsa -in privkey.pem -out private.key does the job.