gpg2 commands

gpg2_commands.sh

# export a public key
gpg2 --export --armor $KEY(S)

# import a public key
gpg2 --import $INPUT_FILE

# encrypt file
gpg2 --encrypt --armor --local-user $SENDER --recipient $RECIPIENT --output $OUTPUT_FILE $INPUT_FILE

# create detached signature for file
gpg2 --armor --detatch-sign --local-user $SENDER $FILE

# decrypt file
gpg2 --decrypt --output $OUTPUT_FILE $INPUT_FILE

# set the default key
echo "default-key $KEY" >> ~/.gnupg/gpg.conf

Setup git to use gpg

git config --global commit.gpgsign true
git config --global user.signingkey <long-fingerprint>

https://help.github.com/articles/signing-commits-using-gpg/

Export a secret key

gpg2 --export-secret-key --armor <key>

https://www.gnupg.org/gph/en/manual/x135.html