How old is unix?
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Is unix os free?
Which language is used in unix?
How to remove certain lines from a file in Unix?
How to give execute permission for a file in unix?
What is the use of -l when listing a directory?
What is path variable in unix?
Name the key features of the bourne shell.
What does a pipe(|) do?
What does unix .profile contains?
Is unix free to use?
What is a superuser?
Why does the server parent need to close the connected socket returns from accept in a concurrent TCP server? What may happen if it does not do so?