Parent Process: All the processes are created when a process executes the fork() system call except the startup process. The process that executes the fork() system call is the parent process. A parent process is one that creates a child process using a fork() system call.

Where is parent and child process in Linux?

To see what the parent process is we can use the ps command with the $PPID environment variable.

What does the parent process do in Linux while the child process is getting executed?

A parent process uses fork to create a new child process. The child process is a copy of the parent. After fork, both parent and child executes the same program but in separate processes.