Exercises Session 9

• Create a file called 'add.sh' with the following content:

#!/bin/bash
expr $1 - $2 

• Make it executable.

• Test it: ./add 23 19 should print 42

• Commit it.

• Create a file called NUMBER and put a 1 in it.

• Commit it.

• Then create 5 more commit changing the file to some other number. (This might help)

echo 7 > NUMBER
git commit -am "7"

• Then change the add.sh file replacing the + by a -.

• Create another 5 commits chaning the NUMBER file.

• No check if the add.sh script works

• ./add.sh 23 19 will now prin 4 instead of 42.

• Using bisect find the commit that broke it.