So, Im going to a friend´s house today and I want to know how to play Call of Duty.
for example, how to walk or shoot etc. What controls do I use for each thing? ( x, o, triangle etc. )
Thanks 
I haven´t played it on playsation 2 Xbox either this would be the first time ever.
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L3 = walk (press to run)
R3 = move camera (press to use knife)
X = jump
square = Reload
circle( O ) = crouch, hold to lie down
triangle = swap gun
R1 = shoot
R2 = throw lehal grenade
L1 = aim gun
L2 = throw tactical grenade
start = pause menu
left d-pad = use attachment (if you have one that requires that button)
right d-pad = use killstreak (if you have one)
Ok you push the left anolog stick forward to move if you want too run you have to push the left anolog stick forward while pressing it down. and you use the right anolog stick to look around. triangle is too swap between your primary and secondary weapon. circle is for crouching, x is for jumping and square is for reloading. L1 is for aiming and R1 is for shooting, L2 is for throwing your smoke granade, concussion granade etc and R2 is for throwing granade’s etc. and thats about it
It will be the same buttons to the ps2
Ppppp
Here you go:
Top of Controller
L1:Aim
L2:Tactical Grenade (stun grenade. Flashbangs, stuff to help you)
R1:Fire your weapon
R2:Leathal Grenade (grenade semtex, stuff that causes damage.)
Right Side
Triangle:Switch Weapon
Square:Reload Weapon
X/Cross:Jump
Circle/O: Crouch (hold down the Cirlce button to Crawl)
Directional Buttons (Left Side)
Up and Down:Select Killstreaks (a killstreak is a reward for getong alot of kills without dying. So getting 3 kills without dying will earn you a UAV while a 25 killstreak will earn you a M.O.A.B ((in terms of Call of Duty: Modern Warfare 3)))
Right:Use Killstreak.
Left and Right Anolog Sticks
Left Anolog Stick:Move
Right Anolog Stick:Look Around
Press Down on Left Anolog (A.K.A.-L3) Run
Press Down on Right Anolog (A.K.A.-R3) Knife
That is the basic controls for all the Call of Duties.
Good Luck.