Ubuntu: 解决 “Require Installation Of Untrusted Packages”

  • Write in a terminal:
    sudo apt-get update && sudo apt-get upgrade


  • or edit Update Manager settings (try this first if you have already configured Update Manager).
  • Launch Update Manager and try again.


Running update through a terminal gives option whether to allow or disallow untrusted packages.

WARNING: The following packages cannot be authenticated!
Install these packages without verification [y/N]?

If you trust the package source, type y.




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