Deadlock is a state in which each user of a group of users on networks( distributed system) waits for another user, including itself to take action, such as sending a message or using network resources commonly releasing a lock, this lock is a common problem facing users in network systems(NWSs), it is named deadlock problem. This problem is occurring in distributed systems where software and hardware share resources through network devices. The deadlock problem has been received. To solve the deadlock problem the important step is deadlock detection which helps us to void the deadlock problem.