GPG - Import Key
1. Import private key
gpg --import private.pgp
2. Import public key
gpg --import public.pgp
3. Trust the key with id (email)
gpg --edit-key <id>
trust and Press Enter
gpg> trust
1 = I don't know or won't say
2 = I do NOT trust
3 = I trust marginally
4 = I trust fully
5 = I trust ultimately
m = back to the main menu
5 to trust the key ultimately
Your dicision? 5
y to confirm trust the key
Do you really want to set this key to ultimate trust? (y/N) y
save save the setting
gpg> save