Linux MInt - W: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details.
The warning message - Key is stored in legacy trusted.
Troubleshoot
How to Setup Printer and Fix Printing Problems in Linux Mint
In this guide, I'll show you how to fix printer
How to Solve Random Freeze in Linux Mint
In this tutorial, we'll see how to solve Random Freezes
Where is the Trash Location in Linux Mint
In Linux Mint and Ubuntu the Trash folder is located
Linux Mint Recovery Mode or Advanced Boot Options
In this article we will see how boot Linux Mint
Linux Mint - Cannot Login (login loop)
In this post it's described a login loop for Linux
Screen flicker and tearing Linux Mint Cinnamon
Do you have screen flicker, blinking, artefacts or tearing using
Linux Mint: Low disk space on Boot
There is a common warning message displayed after updates in
Linux Mint 19 How to disable "login keyring" and Chrome
If you see a popup every time when you start