Common GPG Commands

http://linux.101hacks.com/unix/gpg-command-examples/

#List GPG Keys
gpg --list-public-keys

gpg --gen-key
Username is samuel

#Export Key
gpg --export -a "[email protected]" > public.key
gpg --export-secret-key -a "[email protected]" > private.key

#Encrypt
gpg --recipient samuel --encrypt file.txt

#Decrypt
gpg --decrypt file.txt.gpg > file1.txt

3Ec@lvgEim1*KaDp

#to export a private key:
gpg --export-secret-key -a "samuel" > samuel_private.key

#to import a public key:
gpg --import samuel_public.pub
This adds the public key in the file "samuel_public.pub" to your public key ring.

#to import a private key:
gpg --allow-secret-key-import --import samuel_private.key
This adds the private key in the file "private.key" to your private key ring. There's a note (*) at the bottom explaining why you may want to do this.

#Revoke a Key
gpg --gen-revoke <keyID>


=========================
OpenSSL
http://rietta.com/blog/2012/01/27/openssl-generating-rsa-key-from-command/
The generated files are base64-encoded encryption keys in plain text format.

Generate a 2048 bit RSA Key:
openssl genrsa -des3 -out private.pem 2048
mD4g^9B6gY7rMYh4

Export the RSA Public Key to a File:
openssl rsa -in private.pem -outform PEM -pubout -out public.pem