GPG error saat apt-get update

Pernakah anda mendapatkan warning seperti ini :
root@cygnus:~# apt-get update

Get:1 http://mirror.ee.its.ac.id lenny Release.gpg [386B]
Ign http://mirror.ee.its.ac.id lenny/main Translation-en_US
Ign http://mirror.ee.its.ac.id lenny/contrib Translation-en_US
Ign http://mirror.ee.its.ac.id lenny/non-free Translation-en_US
.
.
.
Fetched 190kB in 0s (575kB/s)
Reading package lists… Done
W: GPG error: http://mirror.ee.its.ac.id lenny Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY A70DAF536070D3A1 NO_PUBKEY 4D270D06F42584E6
W: GPG error: http://mirror.ee.its.ac.id lenny-proposed-updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY A70DAF536070D3A1
W: GPG error: http://mirror.ee.its.ac.id lenny/updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY A70DAF536070D3A1
W: GPG error: http://mirror.ee.its.ac.id lenny Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 394D199524C52AC3
W: You may want to run apt-get update to correct these problems

PS : Perhatikan bagian yang berwarna-warni.

Setelah googling sebentar, ternyata solusinya bgini :

1. Download-kan gpg key dari gpg-server yang ada

root@cygnus:~# gpg --keyserver subkeys.pgp.net --recv A70DAF536070D3A1

gpg: requesting key 6070D3A1 from hkp server subkeys.pgp.net
gpg: /home/lqman/.gnupg/trustdb.gpg: trustdb created
gpg: key 6070D3A1: public key “Debian Archive Automatic Signing Key (4.0/etch) <ftpmaster@debian.org>” imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1

root@cygnus:~# gpg --keyserver subkeys.pgp.net --recv 4D270D06F42584E6

gpg: requesting key F42584E6 from hkp server subkeys.pgp.net
gpg: key F42584E6: public key “Lenny Stable Release Key <debian-release@lists.debian.org>” imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1

root@cygnus:~# gpg --keyserver subkeys.pgp.net --recv 394D199524C52AC3

gpg: requesting key 24C52AC3 from hkp server subkeys.pgp.net
gpg: key 24C52AC3: public key “Debian Unofficial Archive Automatic Signing Key (2007) <ftpmaster@debian-unofficial.org>” imported
gpg: no ultimately trusted keys found
gpg: Total number processed: 1
gpg:               imported: 1

2. tambahkan gpg-key yg telah di download kedalam list apt-key

root@cygnus:~# cat /home/lqman/.gnupg/pubring.gpg | apt-key add -

OK

3. Pastikan gpg anda sudah berhasil dimuat sebagai apt-key

root@cygnus:~# apt-key list

/etc/apt/trusted.gpg
——————–
pub 1024D/6070D3A1 2006-11-20 [expires: 2009-07-01]
uid Debian Archive Automatic Signing Key (4.0/etch)

pub 1024D/F42584E6 2008-04-06 [expires: 2012-05-15]
uid Lenny Stable Release Key

pub 1024D/24C52AC3 2007-01-24 [expired: 2008-02-01]
uid Debian Unofficial Archive Automatic Signing Key (2007)

4. Pastikan sudah tidak ada warning lagi

root@cygnus:~# apt-get update

Get:1 http://mirror.ee.its.ac.id lenny Release.gpg [386B]
Ign http://mirror.ee.its.ac.id lenny/main Translation-en_US
Ign http://mirror.ee.its.ac.id lenny/contrib Translation-en_US
Ign http://mirror.ee.its.ac.id lenny/non-free Translation-en_US
.
.
.
Fetched 190kB in 0s (575kB/s)
Reading package lists… Done

Happy hacking…..
FiX your own warning bro…

thx to :
google
kholis : yang menemaniku di lab common
all of U

Referensi :
google.com
forum id-ubuntu walaupun tidak seberapa membantu
lqman@cygnus:~$ man gpg