Which interpreter does '#!/bin/bash' specify?

The shebang line #!/bin/bash specifies the Bash (Bourne Again SHell) interpreter.

In most Linux systems:

• /bin/bash is the absolute path to the Bash executable file.
• By including this line, you are telling the computer: "Please use the Bash program located in the /bin directory to run the commands inside this file."

If you were writing a Python script, for example, the shebang would look like #!/usr/bin/python3 instead.

Since you've already created the file, you can now move on to the next part of the lab: using chmod u+x script.sh to give yourself permission to execute it!