## Exercise 2

 1. You may want to start by reviewing ‹files.sh›. In this exercise,
    we will write a simple script.

 2. The script should do the following:
    
    ◦ create a new directory called ‹scratch›
    ◦ enter this directory
    ◦ copy all exercise files from ‹~/pb152/01› (1.txt, 2.txt, ...)
    ◦ count how many lines there are in each (try ‹man wc›)
    ◦ change directory back to where you started (hint: try ‹cd ..›)
    ◦ erase everything in ‹scratch› along with the directory
      (‹man rm›)

 3. Be careful with ‹rm›! The option you are looking for is called
    ‘recursive’. You should also use option ‹-i› if you are not 100%
    sure! This will ask about each file to erase before doing so.

 4. Run the script. If you do not remember how, this was mentioned
    near the top of ‹files.sh›.

We will need to review pipes before we go any further. Hence the way
forward is:

    $ cat pipes.txt
