Let’s create our first simple shell script 1 2 3 #!/bin/sh # This is a comment! echo Hello World # This is a comment, too! The first line tells Unix that the file is to be executed by /bin/sh. This is the standard location of the Bourne shell on just about every Unix system. If you’re using GNU/Linux, /bin/sh is normally a symbolic link to bash (or, more recently, dash). The second line begins with a special symbol: #.

Linux, A Path to Digital Simplicity In an age dominated by digital clutter and overwhelming software choices, the minimalist philosophy stands out as a beacon for those seeking simplicity and efficiency. This approach not only applies to physical possessions but extends into the digital realm, where Linux has become a preferred tool for minimalists. Linux, an open-source operating system, embodies the principles of minimalism by offering users control over their digital environments.

An app’s config is everything that is likely to vary between deploys (staging, production, developer environments, etc). This includes: Resource handles to the database, Memcached, and other backing services Credentials to external services such as Amazon S3 or Twitter Per-deploy values such as the canonical hostname for the deploy Apps sometimes store config as constants in the code. This is a violation of twelve-factor, which requires strict separation of config from code.

Type hinting is not mandatory, but it can make your code easier to understand and debug by Improved readability Better IDE support: IDEs and linters can use type hints to check your code for potential errors before runtime. While type hints can be simple classes like float or str , they can also be more complex. The typing module provides a vocabulary of more advanced type hints. Basics 1 2 3 4 5 6 7 8 9 10 11 12 # This is how you declare the type of a variable age: int = 1 # You don't need to initialize a variable to annotate it a: int # Ok (no value at runtime until assigned) # Doing so can be useful in conditional branches child: bool if age < 18: child = True else: child = False 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 x: int = 1 x: float = 1.