Getting Started (Chap 5)

Assignment 4 Answers

  1. Create a script file called nf that contains instructions to count the number of files in the current directory. You can check your answers here. 
    ls | wc -l
  2. What command do you use to make this file executable? 
    chmod +x nf
  3. What directory should you put the file in? 
    ~/bin
  4. Add a comment at the begining of the file with your name and the date 
    # Phil Aylesworth, October 2004
ls | wc -l
  5. Add some text to the output to describe the number. i.e. "Files in the current directory:" 
    # Phil Aylesworth, October 2004
echo "Files in the current directory:"
ls | wc -l
  6. Modify the script so that it includes the absolute pathname of the directory. This is stored in the variable called PWD. 
    # Phil Aylesworth, October 2004
echo "Files in $PWD:"
ls | wc -l
  7. Store your first name in a variable and then display it with a meaningful message. 
    name=Phil
echo "My name is $name."
  8. Add a comment on the same line as you set the variable. 
    name=Phil    # This is my name
echo "My name is $name."
  9. At the command prompt or in a script file, create two variables with numbers stored in them. Calculate the product (multiplication) of these and display it. 
    a=54
b=12
echo "The product of $a and $b is $((a*b))."
  10. Assign the value of this product to another variable then display that new variable. 
    a=54
b=12
c=$((a*b))
echo "The product of $a and $b is $c."