Add custom commands to your server

Hello, is there a way to create custom commands on your server such as /vanish? If yes let me know how

Quote from Roman

You can use plugins for this.

Essentials offers an /vanish command afaik

Thank you but, what plugin should i use?

Quote from Roman

Essentials or EssentialsX (The normal one for 1.8 and lower and EssentialsX for newer minecraft versions)

Is it possible to use EssentialsX on 1.13.2?

Quote from Roman

yes

Okay, thank you so much Roman