There is no public key available for the following key IDs 9ECBEC467F0CEB10
Have you ever encountered this problem while you want to update local repo. This short article could solve your headache. Just Copy and Paste Bash script below:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 9ECBEC467F0CEB10
sudo apt-get updateProblem Solved Enjoy!