<key_id> will be signed by <your_key_id>.
Importing the key from server
[gpg2 –recv-keys <key_id>]{.title-ref}
Verify fingerprint
[gpg2 –fingerprint <key_id>]{.title-ref}
Signing the key
[gpg2 –sign-key <key_id>]{.title-ref}
Sending the key
[gpg2 –armor –output <key_id>.signed_by.<your_key_id>.asc –export <key_id>]{.title-ref}
<key_id>.signed_by.<your_key_id>.asc can be send by email or shared using any file sharing service.
Importing the signed key
[gpg2 –import <key_id>.signed_by.<your_key_id>.asc]{.title-ref}
Exporting the signed key to server
[gpg2 –send-keys <key_id>]{.title-ref}