The following signatures couldn’t be verified because the public key is not available

Kalau kita menemukan error seperti dibawah ini di ubuntu saat melakukan perintah “apt-get update”

W: GPG error: http://download.webmin.com sarge Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY D97A3AE911F63C51

artinya adalah, bahwa pada salah satu repository kita ada source list yang mengarah ke webmin.com dan belum didaftarkan siganture keynya dari yang si empunya

Solusinya adalah:

root@ubuntu:# gpg –keyserver pgpkeys.mit.edu –recv-key D97A3AE911F63C51 && gpg -a –export  D97A3AE911F63C51 | sudo apt-key add –
gpg: requesting key 11F63C51 from hkp server subkeys.pgp.net
gpg: key 11F63C51: “Jamie Cameron <jcameron@webmin.com>” not changed
gpg: Total number processed: 1
gpg:              unchanged: 1
OK

demikian semoga bermanfaat

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