How to change the seed on a Minecraft server

WARNING: To install a seed, you must delete the current world!
**
1 -** Access the control panel of your Minecraft server

2 - Turn off the server, and wait for the console to complete the shutdown

3 - In the management menu, click on "FTP Web"

4 - In the "world" folder , click on "..." and then on "Delete" to delete the current world

5 - Now, open the "server.properties" file and search for "level-seed="

6 - In "level-seed=" , insert the seed you want to load on your server and then click "SAVE CONTENT" to save the file

Done! Now just restart the server and a new world will be generated!