Runing 2 node on same devise

a the title say ive tryed runing the same node on difirent terminal ubuntu and debain but it always say another one is runing or channel taken . and tryed to run difirent node with two difirent key on same pc but difirent terminal but it look lik if i try to log with a key the second one also log with the same key even thogh they are runing on difirent terminal and difient file hope anyone can replay to this or know how to do it or is it even posible