|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.
In his keynote at 18th Cloud Expo, Andrew Keys, Co-Founder of ConsenSys Enterprise, provided an overview of the evolution of the Internet and the Database and the future of their combination – the Blockchain. Andrew Keys is Co-Founder of ConsenSys Enterprise. He comes to ConsenSys Enterprise with capital markets, technology and entrepreneurial experience. Previously, he worked for UBS investment bank in equities analysis. Later, he was responsible for the creation and distribution of life sett...
Jun. 25, 2016 06:15 PM EDT Reads: 964
There are several IoTs: the Industrial Internet, Consumer Wearables, Wearables and Healthcare, Supply Chains, and the movement toward Smart Grids, Cities, Regions, and Nations. There are competing communications standards every step of the way, a bewildering array of sensors and devices, and an entire world of competing data analytics platforms. To some this appears to be chaos. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, Bradley Holt, Developer Advocate a...
Jun. 25, 2016 05:00 PM EDT Reads: 644
Cognitive Computing is becoming the foundation for a new generation of solutions that have the potential to transform business. Unlike traditional approaches to building solutions, a cognitive computing approach allows the data to help determine the way applications are designed. This contrasts with conventional software development that begins with defining logic based on the current way a business operates. In her session at 18th Cloud Expo, Judith S. Hurwitz, President and CEO of Hurwitz & ...
Jun. 25, 2016 03:00 PM EDT Reads: 1,503
In his general session at 18th Cloud Expo, Lee Atchison, Principal Cloud Architect and Advocate at New Relic, discussed cloud as a ‘better data center’ and how it adds new capacity (faster) and improves application availability (redundancy). The cloud is a ‘Dynamic Tool for Dynamic Apps’ and resource allocation is an integral part of your application architecture, so use only the resources you need and allocate /de-allocate resources on the fly.
Jun. 25, 2016 02:15 PM EDT Reads: 997
A strange thing is happening along the way to the Internet of Things, namely far too many devices to work with and manage. It has become clear that we'll need much higher efficiency user experiences that can allow us to more easily and scalably work with the thousands of devices that will soon be in each of our lives. Enter the conversational interface revolution, combining bots we can literally talk with, gesture to, and even direct with our thoughts, with embedded artificial intelligence, wh...
Jun. 25, 2016 01:45 PM EDT Reads: 857
19th Cloud Expo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud strategy. Meanwhile, 94% of enterpri...
Jun. 25, 2016 01:15 PM EDT Reads: 1,190
SYS-CON Events announced today that Bsquare has been named “Silver Sponsor” of SYS-CON's @ThingsExpo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. For more than two decades, Bsquare has helped its customers extract business value from a broad array of physical assets by making them intelligent, connecting them, and using the data they generate to optimize business processes.
Jun. 25, 2016 11:45 AM EDT Reads: 1,150
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with 19th Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world. The Internet of Things (IoT) is the most profound change in personal and enterprise IT since the creation of the Worldwide Web more than 20 years ago. All major researchers estimate there will be tens of billions devices - comp...
Jun. 25, 2016 11:15 AM EDT Reads: 1,152
There is little doubt that Big Data solutions will have an increasing role in the Enterprise IT mainstream over time. Big Data at Cloud Expo - to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA - has announced its Call for Papers is open. Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is...
Jun. 25, 2016 11:00 AM EDT Reads: 1,274
Machine Learning helps make complex systems more efficient. By applying advanced Machine Learning techniques such as Cognitive Fingerprinting, wind project operators can utilize these tools to learn from collected data, detect regular patterns, and optimize their own operations. In his session at 18th Cloud Expo, Stuart Gillen, Director of Business Development at SparkCognition, discussed how research has demonstrated the value of Machine Learning in delivering next generation analytics to imp...
Jun. 25, 2016 11:00 AM EDT Reads: 466
The 19th International Cloud Expo has announced that its Call for Papers is open. Cloud Expo, to be held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, brings together Cloud Computing, Big Data, Internet of Things, DevOps, Digital Transformation, Microservices and WebRTC to one location. With cloud computing driving a higher percentage of enterprise IT budgets every year, it becomes increasingly important to plant your flag in this fast-expanding business opportuni...
Jun. 25, 2016 10:30 AM EDT Reads: 1,217
Cloud computing is being adopted in one form or another by 94% of enterprises today. Tens of billions of new devices are being connected to The Internet of Things. And Big Data is driving this bus. An exponential increase is expected in the amount of information being processed, managed, analyzed, and acted upon by enterprise IT. This amazing is not part of some distant future - it is happening today. One report shows a 650% increase in enterprise data by 2020. Other estimates are even higher....
Jun. 25, 2016 10:15 AM EDT Reads: 1,211
The cloud market growth today is largely in public clouds. While there is a lot of spend in IT departments in virtualization, these aren’t yet translating into a true “cloud” experience within the enterprise. What is stopping the growth of the “private cloud” market? In his general session at 18th Cloud Expo, Nara Rajagopalan, CEO of Accelerite, explored the challenges in deploying, managing, and getting adoption for a private cloud within an enterprise. What are the key differences between wh...
Jun. 25, 2016 10:00 AM EDT Reads: 653
Internet of @ThingsExpo, taking place November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA, is co-located with the 19th International Cloud Expo and will feature technical sessions from a rock star conference faculty and the leading industry players in the world and ThingsExpo Silicon Valley Call for Papers is now open.
Jun. 25, 2016 09:30 AM EDT Reads: 1,078
It is one thing to build single industrial IoT applications, but what will it take to build the Smart Cities and truly society changing applications of the future? The technology won’t be the problem, it will be the number of parties that need to work together and be aligned in their motivation to succeed. In his Day 2 Keynote at @ThingsExpo, Henrik Kenani Dahlgren, Portfolio Marketing Manager at Ericsson, discussed how to plan to cooperate, partner, and form lasting all-star teams to change t...
Jun. 25, 2016 07:45 AM EDT Reads: 1,034
Connected devices and the industrial internet are growing exponentially every year with Cisco expecting 50 billion devices to be in operation by 2020. In this period of growth, location-based insights are becoming invaluable to many businesses as they adopt new connected technologies. Knowing when and where these devices connect from is critical for a number of scenarios in supply chain management, disaster management, emergency response, M2M, location marketing and more. In his session at @Th...
Jun. 25, 2016 07:30 AM EDT Reads: 857
SYS-CON Events announced today that ReadyTalk, a leading provider of online conferencing and webinar services, has been named Vendor Presentation Sponsor at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. ReadyTalk delivers audio and web conferencing services that inspire collaboration and enable the Future of Work for today’s increasingly digital and mobile workforce. By combining intuitive, innovative tec...
Jun. 24, 2016 01:00 PM EDT Reads: 1,326
Amazon has gradually rolled out parts of its IoT offerings, but these are just the tip of the iceberg. In addition to optimizing their backend AWS offerings, Amazon is laying the ground work to be a major force in IoT - especially in the connected home and office. In his session at @ThingsExpo, Chris Kocher, founder and managing director of Grey Heron, explained how Amazon is extending its reach to become a major force in IoT by building on its dominant cloud IoT platform, its Dash Button strat...
Jun. 24, 2016 12:00 PM EDT Reads: 1,582
industrial company for a multi-year contract initially valued at over $4.0 million. In addition to DataV software, Bsquare will also provide comprehensive systems integration, support and maintenance services. DataV leverages advanced data analytics, predictive reasoning, data-driven diagnostics, and automated orchestration of remediation actions in order to improve asset uptime while reducing service and warranty costs.
Jun. 22, 2016 11:00 AM EDT Reads: 1,348
Vidyo, Inc., has joined the Alliance for Open Media. The Alliance for Open Media is a non-profit organization working to define and develop media technologies that address the need for an open standard for video compression and delivery over the web. As a member of the Alliance, Vidyo will collaborate with industry leaders in pursuit of an open and royalty-free AOMedia Video codec, AV1. Vidyo’s contributions to the organization will bring to bear its long history of expertise in codec technolo...
Jun. 19, 2016 12:45 PM EDT Reads: 1,241