Kali Linux Update Warninig

 This warning message is related to the APT package manager in Ubuntu and the MySQL repository.



Solution : 

    Do the following steps ...

  • Go to /etc/apt folder
    • cd /etc/apt/
  • List the files in this directory.
    • ls
  • You will can see file named as trusted.gpg
  • Copy this file to trusted.gpg.d directory
    • sudo cp trusted.gpg trusted.gpg.d
  • Now you can see the trusted.gpg file is copied to trusted.gpg.d directory.
    • cd trusted.gpg.d      
    • ls
  • Now update your system again
    • sudo apt update




There will be no errors

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