To use admin in Dinosaur Simulator on Roblox, you usually need admin access from the game owner or a version of the game that already has an admin system built in. In Roblox admin systems, commands are often entered through chat with a prefix like : or ;, and typing a command list such as cmds or commands is a common way to check whether you have access.

What to try

  1. Open the game and type a command-list check in chat, such as :cmds, ;cmds, :commands, or ;commands.
  1. If a command menu appears, use the listed commands from there.
  1. If nothing happens, you likely do not have admin permissions in that server or game version.

If you are the game owner

If you mean adding admin to your own Roblox simulator game, tutorials for Roblox admin systems show that you add an admin model in Roblox Studio, then edit the settings to place your Roblox username in the owner/admin fields. Those guides also note that you must use the username, not the display name, and then test the commands in play mode.

Important note

A YouTube result mentions a command like :dino all in a free-admin Roblox video, but that is not confirmed as a Dinosaur Simulator command, so it may not work in the game you mean. The safest approach is to check whether Dinosaur Simulator itself exposes an admin menu or whether you have permission from the server owner.

TL;DR

Use the chat command check first, and if you do not have admin access, the commands will not work even if typed correctly. If you are trying to add admin to your own game, do it in Roblox Studio through the admin system’s settings, then test it in play mode.