MD5 & ISOs

You are downloading ISOs -i.e. CDs images to burn (typically Linux distros)- and you want to check the integrity with MD5, but, like me, you regularly forget how to do ! ! Here are solutions.

There's nothing more in English:

•     if you want an English translation, ask for it in the comments.
•     or switch to French by clicking on the command in the top right corner