Why was unix created?
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What is dev null in unix?
Explain the term filter.
What are the file permissions and access modes in unix?
What do you mean by unix operating system?
What does pipe do in unix?
A process is running for 1000 times.How to kill all processes except one i.e kill 999 processes?
How do I show only directories in unix?
What are the various ids in unix processes?
Interviewer: Lets say there is a partition of 100GB. When i tried to create a file using touch command, under any directory, it was unable to create the file- '100% full disk space'. I calculated the size of each and every directory on that partition mannually by adding each file size & in came out to be total size 50GB. Then where is the remaining 50GB ? why it is showing disk space 100% full in 'df -h' command?
How do you make programs portable on unix and dos under such circumstances?
What is difference between find and grep in unix?
What is grep|sort give example?
Unix Commands 
