Difference between the fork() and vfork() system call?
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How many root directories exist in unix?
What does pipe do in unix?
What is dev null in unix?
How do you make programs portable on unix and dos under such circumstances?
Explain the terms links and symbolic links with respect to unix?
How to copy files from one directory to other in unix?
What is the difference between a single dot and double dot in unix?
What does ls mean in unix?
How can you kill a process in unix?
Is unix free?
Write a shell script that requests the user's age and then echoes it, along with some suitable comment.
What is a parent directory in unix?