$ gpg --gen-key

Please select what kind of key you want:

(1) DSA and ElGamal (default)
(2) DSA (sign only)
(4) ElGamal (sign and encrypt)
Your selection? 1 <enter>

5. Selecione o tamanho de sua chave: 2048 (sugestão)

DSA keypair will have 1024 bits.
About to generate a new ELG-E keypair.
minimum keysize is 768 bits
default keysize is 1024 bits
highest suggested keysize is 2048 bits

What keysize do you want? (1024) 2048 <enter>
Do you really need such a large keysize? yes <enter>

5a. Configure a validade de sua chave: 5 anos é um bom tempo.

Requested keysize is 2048 bits
Please specify how long the key should be valid.
0 = key does not expire
<n> = key expires in n days
<n>w = key expires in n weeks
<n>m = key expires in n months
<n>y = key expires in n years
Key is valid for? (0) 5y <enter>
Key expires at Sat Dec 03 16:17:15 2010 EDT

Is this correct (y/n)? y <enter>

5b. Entre com seu endereço(s) de e-mail...

Real name: Novo Usuário <enter>
Email address: [MAILTO] novousuario@ondeaqui.naoexiste <enter>
Comment: "meu primeiro par de chaves =D"

You selected this USER-ID:
"Novo Usuário <[MAILTO] novousuario@ondeaqui.naoexiste>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? O

Pronto!! Sua chave será gerada nesse momento!