By Peter Seebach
This publication introduces an essential new point of shell scripting to the massive variety of directors and builders operating throughout Linux, OS X and Unix command line. whereas there were different shell scripting books, Peter Seebach the following addresses the trendy factor of portability to this extensive consumer base. This booklet, addressing a large know-how base, is determined to develop into the fashionable shell scripting reference.
Read or Download Beginning Portable Shell Scripting: From Novice to Professional (Expert's Voice in Open Source) PDF
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The combo of Linux, Apache, MySQL, and personal home page is well known due to interplay, flexibility, customization, and-most importantly-the fee effectiveness of its componentsHelps LAMP execs take their talents to the subsequent point with in-depth discussions of OOP; extensions of personal home page equivalent to PEAR, GD, XML, and CURL; enhancing web site safety; and complex instruments to be had to the coderThose trained in different languages akin to Java, C++, Perl and ASP will locate this advisor worthy while transitioning to the LAMP environmentThe site contains pattern scripts created during every one bankruptcy, and a number of other functions that may be converted and reused
Reconsider what is attainable with Docker – turn into knowledgeable within the leading edge containerization device to free up new possibilities within the manner you utilize and set up software
About This Book:
Create hugely scalable purposes and companies utilizing the Linux box virtualization paradigm
Extend Docker with exterior structures, together with Heroku and OpenStack
Integrate with the most cutting edge and fascinating orchestration instruments akin to Kubernetes for greater and extra managed deployments
Who This booklet Is For:
If you know Docker's value for innovation in every little thing from procedure management to internet improvement, yet usually are not convinced easy methods to use it to its complete strength, this ebook is for you.
What you are going to Learn:
• develop into fluent with the fundamental elements of Docker
• study most sensible practices for storing and handling Docker files
• safe your packing containers and records with Docker's safeguard features
• use Docker laptop to construct new servers from scratch
• how to arrange and deal with a number of environments with Docker compose
• make the most of Docker Swarm to orchestrate boxes throughout assorted servers
• combine Docker with quite a lot of cloud and configuration instruments to totally detect its potential
Docker has been a game-changer in terms of virtualization – it has now grown to develop into a key driving force of innovation past procedure management, having an influence at the international of net improvement and extra. yet how are you going to verify you are maintaining with the options that it is using? how are you going to make sure you are utilizing it to its complete power? getting to know Docker indicates you ways – it not just demonstrates the right way to use Docker extra successfully, it additionally is helping you reconsider and reimagine what is attainable with Docker.
Covering top practices to ensure you are convinced with and the fundamentals, resembling development, handling and storing packing containers, ahead of diving deeper into Docker protection, you can find every little thing you must assist you expand and combine Docker in new and leading edge methods. you will methods to take better regulate over your bins utilizing a few of Docker's such a lot subtle and worthwhile instruments, similar to Docker compose and Docker swarm, sooner than bringing jointly every little thing you recognize and feature realized to place your packing containers into creation and computer screen them for security and performance.
Beyond this, you are going to additionally discover much more complex thoughts, as you find out how to expand and combine Docker with cloud structures similar to Heroku and OpenStack, and the way instruments comparable to Kubernetes can enhance how you deal with large-scale box orchestration. With additional counsel on how one can use configuration administration instruments resembling Puppet, Chef and PowerShell, by means of the top of the publication you will have a huge and designated feel of precisely what is attainable with Docker – and the way seamlessly it matches with a variety of different systems and tools.
Style and approach:
This e-book takes you thru probably the most subtle Docker instruments in a fashion that is available and useful. it's been created that will help you placed new rules in perform – and to illustrate accurately what is attainable with Docker.
To be able to excel on your paintings as a Linux administrator, or even land a role as one, you wish this booklet. the volume of data and services required of Linux directors has grown drastically over the last 10 years. this day you would like an awesome number of abilities, numerous of them very new. This booklet offers builders, company architects, and location reliability engineers with a valid creation to bleeding-edge Linux-based instruments and applied sciences for either improvement and creation environments.
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Additional resources for Beginning Portable Shell Scripting: From Novice to Professional (Expert's Voice in Open Source)
Thus, this doesn’t work: $ name=John Smith sh: Smith: command not found $ echo hello, $name hello, 10436ch01final 14 10/23/08 11:37:28 PM C h a p t e r 1 ■ I N TRO D U C T I O N T O S HE LL S C R I PT I N G 15 A brief explanation of what went wrong follows in the next section; a full explanation of what went wrong is found in Chapter 3. For now, the key lesson is that the assignment doesn’t work, and you need a way to prevent the shell from splitting words. Introducing Quoting The separation of input into words is generally very useful, but it is occasionally desirable to prevent it.
The two s ingle-quoted strings are adjacent to a double-quoted string containing only an apostrophe; when the quotes are removed, these become a single shell word. The echo command receives only one argument. As this example illustrates, there are a great number of subtleties to the interactions of these features, but this quick tour should prepare you to follow along with code even if you haven’t used any of these features before. The printf Command The printf command was introduced some years back, but many users are unaware of it.
It saves you time porting, it saves you time debugging, and it generally saves you time even during initial development. If you are sharing source with other users or developers, clean code will get more contributions and more useful feedback. If you are prototyping and revising your design as you go, clean code will be easier to maintain and update. Of the code I wrote ten and 15 years ago, the clean code has stayed with me and adapted quickly to new systems; the badly written code has not survived and has often been too much work to update.