You can access the axes of the cylinder with the built-in transform variables forward, up, right, etc.

To translate along the +x axis of the cylinder, for instance, you could do the following:

transform.position += cylinderTransform.forward * distanceToTravel;

Good luck.

float distanceToTravelX ,distanceToTravelY,distanceToTravelZ;
    distanceToTravelX = 1f;
    distanceToTravelY = 1f;
    distanceToTravelZ = 1f;
    Vector3 dir ;
    dir = target.forward * distanceToTravelZ + target.up * distanceToTravelY+ target.right * distanceToTravelX;
    transform.Translate(dir * Time.deltaTime);
Is it good ?