Execute the following commands in terminal: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys <PUBKEY> where <PUBKEY> is your missing public key for repository, e.g. 8BAF9A6F. Then update in terminal:…

Step 1: Download iOS or Android IMDB app. Step 2: Create account by clicking the profile icon in the top right of the app. Step 3: Tap on 'Lists' and create a new List Step…