How can I use the Minecraft's original commands?
for example: /give, /kill, /tp commands.
Because Essentials take over it, but I want to use some command like /kill @e[type=!Player] and /give @p mob_spawner 1 0 {BlockEntityTag:{SpawnData:{id:villager_golem},SpawnPotentials:[]}}
but those command did not work when Essentials it enabled......
Is there any way to stop Essentials take over those commands?

Server: Spigot 1.12
Essentials plugn version: EssentialsX-2.0.1

You can use /execute as @s run >minecraft commands<
and /minecraft:

Please don't comment on years old issues, the discussion has run its course and your suggestion was already offered...

How about add minecraft: prefix when using?
/minecraft:kill @e[type=!Player], /minecraft:give @p ... , ...

or don't use essentials, but you lose more by doing so. :-)

@jyhsu2000 YES! It did work! thank you a lot!!!
But unfortunately... Essentials plugin lock the give spawner command as a Pig_spawner......
the only way to fix this It to remove Essentials plugin, I think......

After place the spawner,
use /spawner command from Essentials to modify the types of mobs of the spawner you're looking at.

That's right...
But I need to put these things into chest, for players to use

I try to create another world and put those Spawners into a chest and load to server, but It still all become Pig Spawner

Use Bukkit's commands.yml to override the commands with their minecraft: version.

If you are having an issue with spawners, please create a separate issue.