|By Martin C. Brown||
|June 15, 2004 12:00 AM EDT||
In this installment of the Book Rookery, Martin C. Brown speaks with Dave Taylor, author of Wicked Cool Shell Scripts, about all the fun things you can do with shell scripts, whether you're running Linux, Mac OS X, or even a mainstream Unix system.
Can you tell us more about the book and what's inside?For years I've picked up different programming books and lamented that they weren't fun or interesting. In the shell scripting world, it's even worse, with book after book talking about how to use an "if" statement, but none containing fun, hip, edgy, and even kind of wacky shell scripts that demonstrate all sorts of useful constructs and capabilities, but focus on being interesting. That's exactly what I've done with my book, though. I skip all the how-to and instructional material - after all, there's tons of stuff online nowadays anyway - and jump straight into the content, into listing and explaining 101 different, fun, and useful shell scripts.
What's your favorite script in the book?Well, I had the most fun figuring out how to get the hangman game (#100) to work in as few lines as possible. A flashback to my early programming life when "toss in more RAM" wasn't the solution to a bloated app! In terms of scripts I use every day, the Mac OS X "titleterm" script (#96) is just part of my everyday activity, and I really like the concepts embodied in the bestcompress script (#38) too.
What's the biggest challenge about using shell scripts?At the end of the day, shell scripts can only be so sophisticated. My rule of thumb is that if the script is growing to be more than 200 lines or so, it's probably time to migrate to a more sophisticated programming environment. For me, it's just about always a switch into C, but I'm an old-time Unix guy so C is second nature to me.
Shell scripts? Why wouldn't people use Perl?Perl is a viable option, but what I think is really great about shell scripts is that everyone who uses Unix, Linux, or the terminal in Mac OS X already has 90% of the skills and expertise needed to begin creating their own shell scripts. Further, every line you type into a shell script can be easily tested at a command line, so I'll often start out a script by building a longer and longer pipe of commands, then eventually just copy and paste the entire command sequence into a file and poof a new script is born.
There are lots of different Unix-related books - including a number that you've written - and shell script books. Why another one?Yes, I admit, I've written Teach Yourself Unix in 24 Hours, Teach Yourself Unix System Administration in 24 Hours, and Unix: Man or Beast?. No, wait. Only the first two titles. Sorry.
More seriously, there are lots of books on Unix and Unix-related topics, but they almost all focus on being either dry reference works (five lines and a table of flags for all 1,600 commands included with your OS, yawn) or on step-by-step tutorials (both of my books fall into this category, the "12,158 simple steps to becoming a Unix expert" style), but there are way too few books that are fun and entertaining, choosing to teach through example and through sheer enthusiasm for the environment. Wicked Cool Shell Scripts endeavors to fill this gap and so far, based on the tremendous response from the Unix and open source community, it's hitting its mark.
What's your take on the SCO lawsuit?I've always wondered about people who put more energy into dragging innovators back to the status quo than in innovating themselves, and I think that's exactly what the SCO team is doing. Last I checked, they weren't doing anything interesting or innovative with Unix, so why would they want to slow the rest of us down? I won't go into conspiracy theories, but there sure are a lot of curious coincidences in this situation. Ultimately, though, I'd like to see the open source community cut SCO off at the knees: work with legal people to identify exactly what code SCO believes is questionable and then have swarms of programmers en masse toss that code out of the Linux code base and rewrite all of it "black box" so that SCO is left holding... nothing.
And in the meantime, innovative work with GNOME, the new kernel, autodiscovery of network resources, further levels of compatibility with samba, and other innovations are the lifeblood of our community, and they're what I'd like to see everyone continue to focus on developing.
Your book also covers Mac OS X: What OS do you run on your main computer, and how Unix-y do you think Mac OS X really is, when compared to a distro like Fedora?I have always been a huge fan of Macs, I have to admit. I remember many, many years ago when I first used a 512K Mac (which was loaned to me by the Whole Earth ‘Lectronic Link, of all groups) and realized that it was a whole new way of looking at usability. This was after years of HP's Windex and X (and I remember when Motif was state of the art, gawd!), but it was so clearly superior... I've been a die-hard Mac person ever since and now I have four Macs in my office, including a brand-new dual G5 system. They not only run Mac OS X but my Terminal window is always open too. It's a fabulous pairing of all the power and capabilities of Unix with the GUI and graphical good karma of Aqua, the Mac OS X graphical environment. It rocks!
And finally, what editor do you like, emacs or vi?Oh boy. I'm a "vi" person and have been forever. Thank you Bill for your work in this area, even if it was oh, so many years ago. However, kudos to the vim team too: vim finally fixes all the annoying limitations of vi.
About the Author
Dave Taylor is author of 15 computer books, including Learning Unix for Mac OS X Panther and Creating Cool Web Sites. You can learn more about Wicked Cool Shell Scripts - and read through the scripts - online at www.intuitive.com/wicked.
Artificial Intelligence has the potential to massively disrupt IoT. In his session at 18th Cloud Expo, AJ Abdallat, CEO of Beyond AI, will discuss what the five main drivers are in Artificial Intelligence that could shape the future of the Internet of Things. AJ Abdallat is CEO of Beyond AI. He has over 20 years of management experience in the fields of artificial intelligence, sensors, instruments, devices and software for telecommunications, life sciences, environmental monitoring, process...
May. 5, 2016 07:45 PM EDT Reads: 1,498
Increasing IoT connectivity is forcing enterprises to find elegant solutions to organize and visualize all incoming data from these connected devices with re-configurable dashboard widgets to effectively allow rapid decision-making for everything from immediate actions in tactical situations to strategic analysis and reporting. In his session at 18th Cloud Expo, Shikhir Singh, Senior Developer Relations Manager at Sencha, will discuss how to create HTML5 dashboards that interact with IoT devic...
May. 5, 2016 07:00 PM EDT Reads: 1,470
The IoTs will challenge the status quo of how IT and development organizations operate. Or will it? Certainly the fog layer of IoT requires special insights about data ontology, security and transactional integrity. But the developmental challenges are the same: People, Process and Platform. In his session at @ThingsExpo, Craig Sproule, CEO of Metavine, will demonstrate how to move beyond today's coding paradigm and share the must-have mindsets for removing complexity from the development proc...
May. 5, 2016 06:00 PM EDT Reads: 1,038
We’ve worked with dozens of early adopters across numerous industries and will debunk common misperceptions, which starts with understanding that many of the connected products we’ll use over the next 5 years are already products, they’re just not yet connected. With an IoT product, time-in-market provides much more essential feedback than ever before. Innovation comes from what you do with the data that the connected product provides in order to enhance the customer experience and optimize busi...
May. 5, 2016 06:00 PM EDT Reads: 1,367
A critical component of any IoT project is the back-end systems that capture data from remote IoT devices and structure it in a way to answer useful questions. Traditional data warehouse and analytical systems are mature technologies that can be used to handle large data sets, but they are not well suited to many IoT-scale products and the need for real-time insights. At Fuze, we have developed a backend platform as part of our mobility-oriented cloud service that uses Big Data-based approache...
May. 5, 2016 04:00 PM EDT Reads: 769
trust and privacy in their ecosystem. Assurance and protection of device identity, secure data encryption and authentication are the key security challenges organizations are trying to address when integrating IoT devices. This holds true for IoT applications in a wide range of industries, for example, healthcare, consumer devices, and manufacturing. In his session at @ThingsExpo, Lancen LaChance, vice president of product management, IoT solutions at GlobalSign, will teach IoT developers how t...
May. 5, 2016 03:45 PM EDT Reads: 726
Digital payments using wearable devices such as smart watches, fitness trackers, and payment wristbands are an increasing area of focus for industry participants, and consumer acceptance from early trials and deployments has encouraged some of the biggest names in technology and banking to continue their push to drive growth in this nascent market. Wearable payment systems may utilize near field communication (NFC), radio frequency identification (RFID), or quick response (QR) codes and barcodes...
May. 5, 2016 02:45 PM EDT Reads: 1,065
SYS-CON Events announced today that Peak 10, Inc., a national IT infrastructure and cloud services provider, will exhibit at SYS-CON's 18th International Cloud Expo®, which will take place on June 7-9, 2016, at the Javits Center in New York City, NY. Peak 10 provides reliable, tailored data center and network services, cloud and managed services. Its solutions are designed to scale and adapt to customers’ changing business needs, enabling them to lower costs, improve performance and focus inter...
May. 5, 2016 02:30 PM EDT Reads: 1,487
We're entering the post-smartphone era, where wearable gadgets from watches and fitness bands to glasses and health aids will power the next technological revolution. With mass adoption of wearable devices comes a new data ecosystem that must be protected. Wearables open new pathways that facilitate the tracking, sharing and storing of consumers’ personal health, location and daily activity data. Consumers have some idea of the data these devices capture, but most don’t realize how revealing and...
May. 5, 2016 01:45 PM EDT Reads: 762
The demand for organizations to expand their infrastructure to multiple IT environments like the cloud, on-premise, mobile, bring your own device (BYOD) and the Internet of Things (IoT) continues to grow. As this hybrid infrastructure increases, the challenge to monitor the security of these systems increases in volume and complexity. In his session at 18th Cloud Expo, Stephen Coty, Chief Security Evangelist at Alert Logic, will show how properly configured and managed security architecture can...
May. 5, 2016 01:30 PM EDT Reads: 588
There is an ever-growing explosion of new devices that are connected to the Internet using “cloud” solutions. This rapid growth is creating a massive new demand for efficient access to data. And it’s not just about connecting to that data anymore. This new demand is bringing new issues and challenges and it is important for companies to scale for the coming growth. And with that scaling comes the need for greater security, gathering and data analysis, storage, connectivity and, of course, the...
May. 5, 2016 12:30 PM EDT Reads: 1,323
The IETF draft standard for M2M certificates is a security solution specifically designed for the demanding needs of IoT/M2M applications. In his session at @ThingsExpo, Brian Romansky, VP of Strategic Technology at TrustPoint Innovation, will explain how M2M certificates can efficiently enable confidentiality, integrity, and authenticity on highly constrained devices.
May. 5, 2016 12:30 PM EDT Reads: 1,357
So, you bought into the current machine learning craze and went on to collect millions/billions of records from this promising new data source. Now, what do you do with them? Too often, the abundance of data quickly turns into an abundance of problems. How do you extract that "magic essence" from your data without falling into the common pitfalls? In her session at @ThingsExpo, Natalia Ponomareva, Software Engineer at Google, will provide tips on how to be successful in large scale machine lear...
May. 5, 2016 10:15 AM EDT Reads: 1,569
You think you know what’s in your data. But do you? Most organizations are now aware of the business intelligence represented by their data. Data science stands to take this to a level you never thought of – literally. The techniques of data science, when used with the capabilities of Big Data technologies, can make connections you had not yet imagined, helping you discover new insights and ask new questions of your data. In his session at @ThingsExpo, Sarbjit Sarkaria, data science team lead ...
May. 5, 2016 09:00 AM EDT Reads: 1,286
SYS-CON Events announced today that Ericsson has been named “Gold Sponsor” of SYS-CON's @ThingsExpo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. Ericsson is a world leader in the rapidly changing environment of communications technology – providing equipment, software and services to enable transformation through mobility. Some 40 percent of global mobile traffic runs through networks we have supplied. More than 1 billion subscribers around the world re...
May. 5, 2016 08:45 AM EDT Reads: 1,398
In his session at @ThingsExpo, Chris Klein, CEO and Co-founder of Rachio, will discuss next generation communities that are using IoT to create more sustainable, intelligent communities. One example is Sterling Ranch, a 10,000 home development that – with the help of Siemens – will integrate IoT technology into the community to provide residents with energy and water savings as well as intelligent security. Everything from stop lights to sprinkler systems to building infrastructures will run ef...
May. 5, 2016 02:00 AM EDT Reads: 1,326
Manufacturers are embracing the Industrial Internet the same way consumers are leveraging Fitbits – to improve overall health and wellness. Both can provide consistent measurement, visibility, and suggest performance improvements customized to help reach goals. Fitbit users can view real-time data and make adjustments to increase their activity. In his session at @ThingsExpo, Mark Bernardo Professional Services Leader, Americas, at GE Digital, will discuss how leveraging the Industrial Interne...
May. 5, 2016 12:45 AM EDT Reads: 1,421
The increasing popularity of the Internet of Things necessitates that our physical and cognitive relationship with wearable technology will change rapidly in the near future. This advent means logging has become a thing of the past. Before, it was on us to track our own data, but now that data is automatically available. What does this mean for mHealth and the "connected" body? In her session at @ThingsExpo, Lisa Calkins, CEO and co-founder of Amadeus Consulting, will discuss the impact of wea...
May. 5, 2016 12:00 AM EDT Reads: 1,242
Whether your IoT service is connecting cars, homes, appliances, wearable, cameras or other devices, one question hangs in the balance – how do you actually make money from this service? The ability to turn your IoT service into profit requires the ability to create a monetization strategy that is flexible, scalable and working for you in real-time. It must be a transparent, smoothly implemented strategy that all stakeholders – from customers to the board – will be able to understand and comprehe...
May. 4, 2016 11:45 PM EDT Reads: 1,296
You deployed your app with the Bluemix PaaS and it's gaining some serious traction, so it's time to make some tweaks. Did you design your application in a way that it can scale in the cloud? Were you even thinking about the cloud when you built the app? If not, chances are your app is going to break. Check out this webcast to learn various techniques for designing applications that will scale successfully in Bluemix, for the confidence you need to take your apps to the next level and beyond.
May. 3, 2016 12:15 PM EDT Reads: 1,657