The web site of carlyle

GnuPG
Memorandum

Generate

gpg --expert --full-gen-key

Add a sub key

gpg --edit-key NAME
addkey

Delete a sub key

gpg --edit-key NAME
key N
delkey

Change the key expiration time

gpg --edit-key NAME
key N
expire

Remarks

[C] certification
[E] encryption
[A] authentication
[S] signing

References

https://www.gnupg.org/documentation/manpage.html