Chapter 10

  1. Nothing

You should use the variable name without the dollar sign to print it.

  1. Solution: zero

Because you should print $1 instead of $2 where $1 is the first field.

  1. The while loop should iterate with i value less than 4 not 3.
  2. 1

Because the only user that has UID less than 1 is root (UID=0), so one line will be printed.

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