How can you get/set an environment variable from a program?
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How do I grep recursively in unix?
Explain how and when a DNS request is solved when a user tries to surf to the site www.abcdeg.in .Assume the user machine uses a local name server and sits on another network other than www.abcdef.in.
How the Kernel handles the fork() system call in traditional Unix and in the System V Unix, while swapping?
Differentiate between paging and swapping?
What is unix kernel?
How many root directories exist in unix?
What is the property of unix?
Explain piping.
What is the command to connect to remote terminals
What are the layers of unix operating system?
How does unix operating system works?
how to kernel protected memory?
Unix Commands 
