W: There is no public key available for the following key IDs: 1397BC53640DB551



$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 1397BC53640DB551


The command above download the missing key using the hexadecimal numbers given in the error (1397BC53640DB551) with apt-key. After running apt-key to download the missing PUBKEY, any packages from that repositories will be considered trusted.


W: There is no public key available for the following key IDs: 1397BC53640DB551 W: There is no public key available for the following key IDs: 1397BC53640DB551 Reviewed by vivek sathisan on 10:54 Rating: 5

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