Buscar llave a modificar:
$ gpg --list-keys liquidat@example.com pub 2048R/ABCDEF12 2012-09-10 [expires: 2032-09-10] uid liquidat <liquidat@example.com> sub 2048R/BCDEF123 2012-09-10 [expires: 2032-09-10]]
Editar llave y modificar:
$ gpg --edit-key ABCDEF12
gpg (GnuPG) 1.4.12; Copyright (C) 2012 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Secret key is available.
pub 2048R/ABCDEF12 created: 2012-09-10 expires: 2013-09-10 usage: SC
trust: ultimate validity: ultimate
sub 2048R/BCDEF123 created: 2012-09-10 expires: 2013-09-10 usage: E
[ultimate] (1). liquidat <liquidat@example.com>
gpg> expire
Changing expiration time for the primary key.
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) 3y
Key expires at Fri May 6 15:45:42 2016 CEST
Is this correct? (y/N) y
You need a passphrase to unlock the secret key for
user: "liquidat <liquidat@example.com>"
2048-bit RSA key, ID ABCDEF12, created 2012-09-10
gpg> list
pub 2048R/ABCDEF12 created: 2012-09-10 expires: 2016-09-10 usage: SC
trust: ultimate validity: ultimate
sub 2048R/BCDEF123 created: 2012-09-10 expires: 2013-09-10 usage: E
[ultimate] (1). liquidat <liquidat@example.com>
gpg> key 1
pub 2048R/ABCDEF12 created: 2012-09-10 expires: 2016-09-10 usage: SC
trust: ultimate validity: ultimate
sub* 2048R/BCDEF123 created: 2012-09-10 expires: 2013-09-10 usage: E
[ultimate] (1). liquidat <liquidat@example.com>
gpg> expire
Changing expiration time for a subkey.
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) 3y
Key expires at Fri May 6 15:45:42 2016 CEST
Is this correct? (y/N) y
You need a passphrase to unlock the secret key for
user: "liquidat <liquidat@example.com>"
2048-bit RSA key, ID BCDEF123, created 2012-09-10
gpg> list
pub 2048R/ABCDEF12 created: 2012-09-10 expires: 2016-09-10 usage: SC
trust: ultimate validity: ultimate
sub 2048R/BCDEF123 created: 2012-09-10 expires: 2016-09-10 usage: E
[ultimate] (1). liquidat <liquidat@example.com>
gpg> save
Subir al keyserver:
$ gpg --keyserver pgp.mit.edu --send-keys ABCDEF12 gpg: sending key ABCDEF12 to hkp server pgp.mit.edu