Scripting Basics: Read and Change a Short Script

By the end of this lesson you can explain what a script is, read the shebang line, read variables, if and a loop in bash and in Python, change one value and predict the new output, and follow the one habit that keeps you safe: read a script before you run it. There is no lab in this lesson: every command is shown together with the exact result it prints. The scripts do a defender's job, counting failed logins in a small practice log file, and the only changes made are to the learner's own copies in their own home folder.