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Positional Arguments

Programming languages have functions, and functions take arguments. For example, this Python function takes two parameters, xp and level:

def print_player(xp, level):
    print("Player has", xp, "xp and is level", level)

It can then be called with two arguments:

print_player(100, 2)
# Player has 100 xp and is level 2

In a shell, commands (programs) can also take arguments. For example, the cd command takes a single argument (the directory to change to):

cd /home/wagslane

Other commands might take multiple arguments. For example, the mv command takes two arguments: the file to move, and the destination to move it to:

mv file.txt dest/file.txt

Assignment

Take a look inside the worldbanc/public directory. cat the contents of the suspicious-looking key.txt file. This looks like some kind of private key... why is it in the public directory?
Move key.txt from worldbanc/public/ to worldbanc/private/.

The mv command lets you rename the file you're moving, so be careful to keep the same name, changing only the directory in which it's located!
List the contents of the worldbanc/private directory to confirm key.txt made it there.

Submit the shell checks.