Question

9. The command "chmod 711 menu script" allows the owner read, write and execute permissions, and only permission for group and other o. Explain why you would use a "Here Document "in your shell script over using the echo commands? 11. What will the following statements provide "from the main body" when the awk script is executed? Field 1 Example: one line of input "widget: 1.59 : 83 Note! the: is the delimiter. Example: Unit-widget, price per/unit -$1.59, quantity number on hand- 83 main body start item $1 price_per_unit $2 quantity_on _hand -S3 unit inventory total-price per unit* quantity_on hand printf " Unit Inventory Total ",unit inventory_total,item %6.2f for % 10s main body end

Answer 1

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9) Ans: Execute
Explanation:
1) Always remember this. 4 - read, 2 - write and 1 - execute.
2) With that 7 means 4+2+1 which is read, write and execute permission to owner whereas 11 represents only execute permission for the other and group.

10) Ans:
here by document(<<) command is used to read input from the current source which means instead of getting input from user or some other source it gets input from the current source program itself. Thats why it is called here document or heredoc.

11)
As per given line which is "widget: 1.59: 83"

1) In the awk script item will be captured the first column i.e. widget.
2) price_per_unit will capture the second column i.e. 1.59 and
3) quantity_on_hand is captured as 83.
4) As unit_inventory_total is price_per_unit * quantity_On_hand. 131.97 is the unit_inventory_total and item will be widget.
5) So program prints "131.97 for widget"