https://www.balena.io/etcher
Generate PGP keys:
gpg --expert --full-generate-key
Issue sub-keys:
gpg --expert --edit-key
> addkey
Export master private key:
gpg --armor --export-secret-keys
Create revocation certificate:
gpg --gen-revoke
Export public key:
gpg --armor --export
Export private sub-keys:
gpg --armor --export-secret-subkeys
Show fingerprints:
gpg --fingerprint --fingerprint
Show private keys in GPG keyring:
gpg --list-secret-keys
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