TCS Python Hackathon - UNIX Hands-on

TCS Python Hackathon - UNIX Hands-on

Q1.  Write the UNIX command to count the occurrence of the word "Unix" in a given file. The file will be given as command line argument while the script containing your command will be run.


 grep -o -i unix | wc -l



Q2. Write the unix command to count the number of words in the first 3 lines of a file.The file will be given as a command line argument when the script containing your command will run.


head -3|wc -w

Q3. Write a shell script to find the sum of all even numbers from a list of given numbers. The script should first of all take the count of numbers to be added as user input followed by the numbers one by one.
The output should print the following :
Total = <Sum>


read n
awk '
    BEGIN
        {
            sum=0;
        }
        {
            if( $0%2==0)
                {
                    sum=sum+$0;
                }
        }
    END
        {
            print "Total","=",sum
        }'

Q4. Student details are stored in a file in the following order with space as the delimiter:
RollNo Name Score
Write a unix command to find the name of the Student who has the highest score.
The file will be given as a command line argument when the script containing your command will run.


sort -k3,3 -rn -t" " | head -n1 | awk '{print $2}'