% gpg

# GPG version
gpg --version

# GPG generate key
gpg --gen-key

# List keys
gpg --list-keys

# Export public key
gpg --output <filename> --export <gpg_public_keys>

# Export public key as ASCII
gpg --output <filename> --export --armor <gpg_public_keys>

# Import public key
gpg --import <gpg_files>

# Encrypt document
gpg --output <filename> --encrypt --recipient <gpg_public_keys> <files>

# Decrypt document
gpg --output <filename> --decrypt <files>

# Make a signature
gpg --output <signature_file> --sign <files>

# Verify signature
gpg --verify <files>

# Clearsign documents
gpg --clearsign <filename>

# Detach signature
gpg --output <filename_sig> --detach-sig <filename>

$ files: ls * | awk '{print $1}'
$ gpg_files: ls *.gpg | awk '{print $1}'
$ gpg_public_keys: gpg --list-keys | grep uid | sed 's/.*<\(.*\)>.*/\1/' | awk '{print $1}'