Most commands (if not all) ULX commands are basically like this in console, this example, slay: ulx slay *Name*.
Now you can also do this in chat, because it may be a bit easier, and again, most commands (again, if not all) are able to be done through this in chat, same example, slay: !slay *Name*
If you're a superadmin on the server you've hosted ULX on, the only thing you need to do is to do "ulx help" in console and you'll see a list of all the ULX commands you can use.
Full list of ULX commands are in this thread:
Click here.