Follow the pilot tubing from the pilot back to the b 60 gas valve and you will see a b valve on the the bottom of the gas valve turn until pilot is off.
How to turn off pilot light on wall heater.
The pilot light is inside the heater behind a metal plate.
Simple video showing how to shut off a pilot light to a gas furnace.
Once the dial is turned off the gas supply will shut off for your furnace and cause the pilot light to turn off.
The pilot valve handle is facing toward the rear.
Re lighting your pilot flame.
Pilot light left on parasitic f.
Switch the dial to the off position if your furnace has one.
Turn the dial so the arrow or mark on top points to the off position.
Light a match and hold it directly beneath the tube in the pilot opening.
Make sure the gas valve is turned on lever should be parallel to the pipe turn the furnace dial to pilot position.
For others you will have to open the cover of the burner area or remove it altogether then follow the gas connection from the main gas supply to the pilot light.
Water heater is similar they re all similar actually.
Also check the first pic you posted.
Remove the match but continue to hold the knob down.
Once you find the dial press down on it so you re able to rotate it.
The valve you show in your pics is a burner valve not pilot valve.