Debian / Ubuntu Linux 遇到大量的 GPG error (BADSIG) 要怎麼解決呢？
錯誤訊息如下述：
問題1
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://dl.google.com stable Release: 以下簽名無效： BADSIG A040830F7FAC5991 Google, Inc. Linux Package Signing Key \<[email protected]\>
W: 無法取得 http://dl.google.com/linux/mod-pagespeed/deb/dists/stable/Release，
W: Some index files failed to download. They have been ignored, or old ones used instead.
問題2
W: GPG error: http://dl.google.com stable Release: The following signatures were invalid: BADSIG A040830F7FAC5991 Google, Inc. Linux Package Signing Key \<[email protected]\>
W: GPG error: http://security.ubuntu.com precise-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key \<[email protected]\>
W: GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key \<[email protected]\>
W: GPG error: http://ppa.launchpad.net precise Release: The following signatures were invalid: BADSIG 531EE72F4C9D234C Launchpad webupd8
W: GPG error: http://in.archive.ubuntu.com precise Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key \<[email protected]\>
W: GPG error: http://in.archive.ubuntu.com precise-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key \<[email protected]\>