How do you find orphan processes?

Orphaned processes can be found easily with the ps command as well. Within the ps output there is a PPID column which will show the processes parent process id; a orphaned process will have the PPID of 1 which is the init process.

What happens to orphaned processes in Linux?

An orphan process is a running process whose parent process has finished or terminated. In a Unix-like operating system any orphaned process will be immediately adopted by the special init system process. This operation is called re-parenting and occurs automatically.