Minecraft: How to install a datapack
First download your favorite datapack to your PC. You can get datapacks e.g. at the following sites:
Make sure that you select the correct Minecraft version for the datapacks. The datapacks are only needed on the server.
If you have all datapacks as zip-files together, you can upload them to your server. Open your FTP program and connect to your server. Here is a tutorial on how to use the FTP-connection.
Now go to your world folder (this is the folder with the same name as your world name) and there you will find a “datapacks” folder:
Open this folder and add your datapacks as a zip via drag & drop. Restart your server and you can use your new datapacks.