摘要:
现象:sudo apt-get updateReading package lists... Error!W: GPG error: http://extras.ubuntu.com precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster@ubuntu.com>E: Encountered a section with no Package: headerE: Probl 阅读全文