UNIX Interview Question

1. Listing files

>ls

add.sh

logfile.txt

prime.pl

2. Displaying the contents of a file.

>cat file.txt

This is a sample unix file

Learning about unix server is awesome

3. Displaying first few lines from a file.

>head -5 logfile.dat

4. Creating a file.

touch new_file.txt

7. copying the contents of one file into another.

>cp file1 file2

8. Renaming and moving the files.

Renaming file

>mv file.txt new_file.txt

Moving the file to another directory.

>mv new_file.txt tmp/

9. Finding the number of lines in a file

>wc logfile.txt

21  26 198 logfile.txt

10. Replace text with Awk command

>cat file.txt

Learn unix

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awk '{if($2=="unix") {$2="fedora"} print $0}' file.txt

Learn fedora

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11. how to  print the date on the terminal?

>date

Mon Jan 23 01:37:51 PST 2012

12. Write a unix/linux date command to print the date in GMT/UTC time zone?

>date -u

Mon Jan 23 09:40:21 UTC 2012

13. Write a unix/linux date command to display only the date part and ignore the time part?

 >date '+%m-%d-%Y'

01-23-2012