cost for ccna

cost for ccna.UNIX processes include child processes, init processes, orphan processes, zombie processes, and daemons.All UNIX processes have a parent process, except for the init process, which has a PID of 1. Orphan processes are born when the parent process terminates and the child process is allowed to continue running independently.A zombie process is one that is still "registered" in the process table, even though the memory and resources associated with it have been freed.9.3forkallows a process to create a new process with the system call fork. The process calling fork is called the parent process, and the newly createdprocess is called the child process. This means that the fork command returns a process ID (PID) and the parent and child processes run in differentThe parent and child processes run in different memory spaces, and the child process is a "replica" of the parent. The entire virtual space of the parent process (including all memory space)will be copied in the child process. The child process also inherits copies of the parent's open file descriptor collections, copies of open message queue descriptors, and copies of open message queue descriptors.descriptors opened by the parent process, a copy of the open message queue descriptors, and a copy of the open directory stream.To verify which process is the parent and which is the child, you can execute the fork command. The result of the fork command execution is shown below.