|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.
SYS-CON Events announced today that Commvault, a global leader in enterprise data protection and information management, has been named “Bronze Sponsor” of SYS-CON's 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Commvault is a leading provider of data protection and information management solutions, helping companies worldwide activate their data to drive more value and business insight and to transform moder...
Sep. 27, 2016 03:15 PM EDT Reads: 2,756
The many IoT deployments around the world are busy integrating smart devices and sensors into their enterprise IT infrastructures. Yet all of this technology – and there are an amazing number of choices – is of no use without the software to gather, communicate, and analyze the new data flows. Without software, there is no IT. In this power panel at @ThingsExpo, moderated by Conference Chair Roger Strukhoff, panelists will look at the protocols that communicate data and the emerging data analy...
Sep. 27, 2016 03:00 PM EDT Reads: 1,689
Digital innovation is the next big wave of business transformation based on digital technologies of which IoT and Big Data are key components, For example: Business boundary innovation is a challenge to excavate third-party business value using IoT and BigData, like Nest Business structure innovation may propose re-building business structure from scratch, as Uber does in the taxicab industry The social model innovation is also a big challenge to the new social architecture with the design fr...
Sep. 27, 2016 02:45 PM EDT Reads: 1,252
Fifty billion connected devices and still no winning protocols standards. HTTP, WebSockets, MQTT, and CoAP seem to be leading in the IoT protocol race at the moment but many more protocols are getting introduced on a regular basis. Each protocol has its pros and cons depending on the nature of the communications. Does there really need to be only one protocol to rule them all? Of course not. In his session at @ThingsExpo, Chris Matthieu, co-founder and CTO of Octoblu, walk you through how Oct...
Sep. 27, 2016 02:45 PM EDT Reads: 2,201
Complete Internet of Things (IoT) embedded device security is not just about the device but involves the entire product’s identity, data and control integrity, and services traversing the cloud. A device can no longer be looked at as an island; it is a part of a system. In fact, given the cross-domain interactions enabled by IoT it could be a part of many systems. Also, depending on where the device is deployed, for example, in the office building versus a factory floor or oil field, security ha...
Sep. 27, 2016 02:30 PM EDT Reads: 313
Is your aging software platform suffering from technical debt while the market changes and demands new solutions at a faster clip? It’s a bold move, but you might consider walking away from your core platform and starting fresh. ReadyTalk did exactly that. In his General Session at 19th Cloud Expo, Michael Chambliss, Head of Engineering at ReadyTalk, will discuss why and how ReadyTalk diverted from healthy revenue and over a decade of audio conferencing product development to start an innovati...
Sep. 27, 2016 02:15 PM EDT Reads: 1,988
Data is an unusual currency; it is not restricted by the same transactional limitations as money or people. In fact, the more that you leverage your data across multiple business use cases, the more valuable it becomes to the organization. And the same can be said about the organization’s analytics. In his session at 19th Cloud Expo, Bill Schmarzo, CTO for the Big Data Practice at EMC, will introduce a methodology for capturing, enriching and sharing data (and analytics) across the organizati...
Sep. 27, 2016 01:30 PM EDT Reads: 1,713
IoT is fundamentally transforming the auto industry, turning the vehicle into a hub for connected services, including safety, infotainment and usage-based insurance. Auto manufacturers – and businesses across all verticals – have built an entire ecosystem around the Connected Car, creating new customer touch points and revenue streams. In his session at @ThingsExpo, Macario Namie, Head of IoT Strategy at Cisco Jasper, will share real-world examples of how IoT transforms the car from a static p...
Sep. 27, 2016 01:00 PM EDT Reads: 1,596
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...
Sep. 27, 2016 01:00 PM EDT Reads: 2,661
If you had a chance to enter on the ground level of the largest e-commerce market in the world – would you? China is the world’s most populated country with the second largest economy and the world’s fastest growing market. It is estimated that by 2018 the Chinese market will be reaching over $30 billion in gaming revenue alone. Admittedly for a foreign company, doing business in China can be challenging. Often changing laws, administrative regulations and the often inscrutable Chinese Interne...
Sep. 27, 2016 12:26 PM EDT Reads: 253
SYS-CON Events has announced today that Roger Strukhoff has been named conference chair of Cloud Expo and @ThingsExpo 2016 Silicon Valley. The 19th Cloud Expo and 6th @ThingsExpo will take place on November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. "The Internet of Things brings trillions of dollars of opportunity to developers and enterprise IT, no matter how you measure it," stated Roger Strukhoff. "More importantly, it leverages the power of devices and the Interne...
Sep. 27, 2016 12:15 PM EDT Reads: 3,216
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.
Sep. 27, 2016 12:15 PM EDT Reads: 4,560
SYS-CON Events announced today that China Unicom will exhibit 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. China United Network Communications Group Co. Ltd ("China Unicom") was officially established in 2009 on the basis of the merger of former China Netcom and former China Unicom. China Unicom mainly operates a full range of telecommunications services including mobile broadband (GSM, WCDMA, LTE F...
Sep. 27, 2016 12:00 PM EDT Reads: 1,785
"My role is working with customers, helping them go through this digital transformation. I spend a lot of time talking to banks, big industries, manufacturers working through how they are integrating and transforming their IT platforms and moving them forward," explained William Morrish, General Manager Product Sales at Interoute, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Sep. 27, 2016 12:00 PM EDT Reads: 3,884
Video experiences should be unique and exciting! But that doesn’t mean you need to patch all the pieces yourself. Users demand rich and engaging experiences and new ways to connect with you. But creating robust video applications at scale can be complicated, time-consuming and expensive. In his session at @ThingsExpo, Zohar Babin, Vice President of Platform, Ecosystem and Community at Kaltura, will discuss how VPaaS enables you to move fast, creating scalable video experiences that reach your...
Sep. 27, 2016 12:00 PM EDT Reads: 1,075
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...
Sep. 27, 2016 12:00 PM EDT Reads: 3,500
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.
Sep. 27, 2016 11:45 AM EDT Reads: 2,747
“We're a global managed hosting provider. Our core customer set is a U.S.-based customer that is looking to go global,” explained Adam Rogers, Managing Director at ANEXIA, in this SYS-CON.tv interview at 18th Cloud Expo, held June 7-9, 2016, at the Javits Center in New York City, NY.
Sep. 27, 2016 11:30 AM EDT Reads: 3,017
SYS-CON Events announced today that SoftLayer, an IBM Company, has been named “Gold Sponsor” of SYS-CON's 18th Cloud Expo, which will take place on June 7-9, 2016, at the Javits Center in New York, New York. SoftLayer, an IBM Company, provides cloud infrastructure as a service from a growing number of data centers and network points of presence around the world. SoftLayer’s customers range from Web startups to global enterprises.
Sep. 27, 2016 11:15 AM EDT Reads: 972
The vision of a connected smart home is becoming reality with the application of integrated wireless technologies in devices and appliances. The use of standardized and TCP/IP networked wireless technologies in line-powered and battery operated sensors and controls has led to the adoption of radios in the 2.4GHz band, including Wi-Fi, BT/BLE and 802.15.4 applied ZigBee and Thread. This is driving the need for robust wireless coexistence for multiple radios to ensure throughput performance and th...
Sep. 27, 2016 11:00 AM EDT Reads: 1,608