添加deb的源後，執行update報錯 NO_PUBKEY 64AA94D00B849883的...

This is a new feature of the apt-get system that guarantees the authenticity of servers for updating Debian. 
Solution


Simply type the following commands, taking care to replace the number below with that of the key that was displayed in the error message: 
gpg --keyserver pgpkeys.mit.edu --recv-key  64AA94D00B849883      
gpg -a --export 64AA94D00B849883 | sudo apt-key add -