Cryptocurrency: Your Total Cost Is 01001010010
Most people have heard of gold. Most people are familiar with dollars. For a handful of geeky folks, however, the currency they hope will become a global standard is digital. Whether it's a problem or not, the currency you use on a day-to-day basis is tied to the government. The global value of the money in your pocket can vary widely, and if you're a conspiracy theorist, your concern might be that it could be worth nothing in the blink of an eye.
Surely gold and silver are wise investments if you're concerned your paper dollars will drop in value, but using gold as a means to buy a gallon of milk is a bit difficult. Perhaps cryptocurrencies are the solution. The most popular form of cryptocurrency is the Bitcoin. A very simple explanation of how it works is as follows:
Users download the bitcoin client and use their computer to solve complex math problems, which create a cryptographic record of any transactions on the Bitcoin P2P network.
Users are rewarded Bitcoins for successfully "hashing" the cryptographic record of transactions, and that reward system is how Bitcoins are created.
Users then securely transfer Bitcoins back and forth to purchase items, and those transactions are recorded in the cryptographic history for the entire P2P network to see.
The process is, of course, a little more complicated than that, but that's basically how it works. The computers creating the cryptographic history of transactions are called miners, and "Bitcoin Mining" is simply the act of solving complex math problems in order to make a cryptographic record of transactions. Because mining Bitcoins is how the currency is created, lots of people are connected to the network, racing each other to get a solution that will generate a reward. In fact, it's so competitive, that unless you have a high-end GPU that can process the equations extremely fast, there is no point in trying for the rewards.
Are Bitcoins the future of global currencies? Will one of the alternative cryptocurrencies like Litecoin or Solidcoin become commonplace? The number of places that accept cryptocurrencies are extremely limited, so it's not any easier to buy a gallon of milk with a Bitcoin than it is with a lump of gold, but many think that day is coming. What about you? Do you think cryptocurrency has a future, or do you think it's a geeky fad that will fade away? Send an e-mail with "CRYPTOCURRENCY" in the subject line to email@example.com, and I'll follow up with an article based on your feedback. For more information on cryptocurrencies, check out these Web sites: http://www.bitcoin.org, http://www.litecoin.org and http://www.solidcoin.info.
Practical Task Scheduling Deployment
July 20, 2016 12:00 pm CDT
One of the best things about the UNIX environment (aside from being stable and efficient) is the vast array of software tools available to help you do your job. Traditionally, a UNIX tool does only one thing, but does that one thing very well. For example, grep is very easy to use and can search vast amounts of data quickly. The find tool can find a particular file or files based on all kinds of criteria. It's pretty easy to string these tools together to build even more powerful tools, such as a tool that finds all of the .log files in the /home directory and searches each one for a particular entry. This erector-set mentality allows UNIX system administrators to seem to always have the right tool for the job.
Cron traditionally has been considered another such a tool for job scheduling, but is it enough? This webinar considers that very question. The first part builds on a previous Geek Guide, Beyond Cron, and briefly describes how to know when it might be time to consider upgrading your job scheduling infrastructure. The second part presents an actual planning and implementation framework.
Join Linux Journal's Mike Diehl and Pat Cameron of Help Systems.
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- Managing Linux Using Puppet
- Doing for User Space What We Did for Kernel Space
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- Rogue Wave Software's Zend Server
With all the industry talk about the benefits of Linux on Power and all the performance advantages offered by its open architecture, you may be considering a move in that direction. If you are thinking about analytics, big data and cloud computing, you would be right to evaluate Power. The idea of using commodity x86 hardware and replacing it every three years is an outdated cost model. It doesn’t consider the total cost of ownership, and it doesn’t consider the advantage of real processing power, high-availability and multithreading like a demon.
This ebook takes a look at some of the practical applications of the Linux on Power platform and ways you might bring all the performance power of this open architecture to bear for your organization. There are no smoke and mirrors here—just hard, cold, empirical evidence provided by independent sources. I also consider some innovative ways Linux on Power will be used in the future.Get the Guide