HOW-TOs

Examining Data Using Pandas

You don't need to be a data scientist to use Pandas for some basic analysis. Traditionally, people who program in Python use the data types that come with the language, such as integers, strings, lists, tuples and dictionaries. Sure, you can create objects in Python, but those objects typically are built out of those fundamental data structures.

Nextcloud 13: How to Get Started and Why You Should

Nextcloud could be the first step toward replacing proprietary services like Dropbox and Skype. In its simplest form, the Nextcloud server is "just" a personal, free software alternative to services like Dropbox or iCloud. You can set it up so your files are always accessible via the internet, from wherever you are, and share them with your friends. However, Nextcloud can do so much more.

Generating Good Passwords, Part I

Dave starts a new method for generating secure passwords with the help of 1Password. A while back I shared a script concept that would let you enter a proposed password for an account and evaluate whether it was very good (well, maybe "secure" would be a better word to describe the set of tests to ensure that the proposed password included uppercase, lowercase, a digit and a punctuation symbol to make it more unguessable).

Everything You Need to Know about the Cloud and Cloud Computing, Part II: Using the Cloud

How to get started with AWS, install Apache, create an EFS volume and much more. The cloud is here to stay, regardless of how you access data day to day. Whether you are uploading and sharing new photos with friends in your social-media account or updating documents and spreadsheets alongside your peers in your office or school, chances are you're connecting to the cloud in some form or another.

Developing Console Applications with Bash

As a novice software developer, the one thing I look for when choosing a programming language is this: is there a library that allows me to interface with the system to accomplish a task? If Python didn't have Flask, I might choose a different language to write a web application. For this same reason, I've begun to develop many, admittedly small, applications with Bash. Although Python, for example, has many modules to import and extend functionality, Bash has thousands of commands that perform a variety of features, including string manipulation, mathematic computation, encryption and database operations. In this article, I take a look at these features and how to use them easily within a Bash application.

Randomly Switching Upper and Lowercase in a Shell Script

Dave wraps up the shell-script L33t generator Last time, I talked about what's known informally as l33t-speak, a series of letter and letter-pair substitutions that marks the jargon of the hacker elite (or some subset of hacker elite, because I'm pretty sure that real computer security experts don't need to substitute vowels with digits to sound cool and hip).

More L337 Translations

Dave continues with his shell-script L33t translator. In my last article, I talked about the inside jargon of hackers and computer geeks known as "Leet Speak" or just "Leet". Of course, that's a shortened version of the word Elite, and it's best written as L33T or perhaps L337 to be ultimately kewl. But hey, I don't judge.

Multiprocessing in Python

Python's "multiprocessing" module feels like threads, but actually launches processes. Many people, when they start to work with Python, are excited to hear that the language supports threading. And, as I've discussed in previous articles, Python does indeed support native-level threads with an easy-to-use and convenient interface.

Tackling L33t-Speak

How to script a l33t-speak translator. My daughter and I were bantering with each other via text message this morning as we often do, and I dropped into a sort of mock "leet speak". She wasn't impressed, but it got me thinking about formulaic substitutions in language and how they represent interesting programming challenges.

ZFS for Linux

Presenting the Solaris ZFS filesystem, as implemented in Linux FUSE, native kernel modules and the Antergos Linux installer.

Rapid, Secure Patching: Tools and Methods

Generate enterprise-grade SSH keys and load them into an agent for control of all kinds of Linux hosts. Script the agent with the Parallel Distributed Shell (pdsh) to effect rapid changes over your server farm.

Getting Started with ncurses

How to use curses to draw to the terminal screen. While graphical user interfaces are very cool, not every program needs to run with a point-and-click interface. For example, the venerable vi editor ran in plain-text terminals long before the first GUI.