If you're installing a gas stove, the first thing you need to do is shut off the gas supply to your kitchen. Then, remove the old stove and disconnect the gas and electrical lines. Next, connect the new stove's gas and electrical lines, making sure that they're securely fastened. Finally, turn on the gas supply and test your new appliance.

Here is a link to a video on how to install a gas stove. The installation process may vary depending on the make and model of your stove, but in general, you will need to turn off the gas supply at the valve, disconnect the old stove, connect the new stove, and reattach the gas line. Be sure to have a professional install your appliances if you are not comfortable doing it yourself.