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Unix Interview Questions and Answers

Related differences

Linux vs Unix

Ques 11. What is the use of the command "ls -x chapter[1-5]"

ls stands for list; so it displays the list of the files that starts with 'chapter' with suffix '1' to '5', chapter1, chapter2, and so on.

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Ques 12. Is 'du' a command? If so, what is its use?

Yes, it stands for 'disk usage'. With the help of this command you can find the disk capacity and free space of the disk.

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Ques 13. Is it possible to count number char, line in a file; if so, How?

Yes, wc-stands for word count.
wc -c for counting number of characters in a file.
wc -l for counting lines in a file.

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Ques 14. Name the data structure used to maintain file identification?

'inode', each file has a separate inode and a unique inode number.

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Ques 15. How many prompts are available in a UNIX system?

Two prompts, PS1 (Primary Prompt), PS2 (Secondary Prompt).

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