Jigsaw: A Revolutionary Web Server for Linux
Jigsaw comes with an administration tool called JigAdmin. JigAdmin is a graphical interface that communicates with the JigAdmin Administration Server. This server can administer multiple Jigsaw servers running on the same machine, provided that those servers have been launched by the same Java Virtual Machine.
The version of JigAdmin that comes with Jigsaw 2.1.1 is built with Swing components; it is easy to use with drag-and-drop features. Additionally, it comes with an extensive documentation explaining how to run JigAdmin, the command-line options, and a complete explanation for its menus and their functionality.
The default configuration files provided by the default installation are designed to start two servers, an instance of the Jigsaw server and one JigAdmin Server. However, to start the JigAdmin, we can also use the provided sample script:
% ./scripts/jigadmin.sh &
We get the authentication window (see Figure 2). The realm used to access the server is admin, the default user is admin and the default password is also admin. It is highly recommended to modify the username and password after you log in the first time.
After the authentication phase, we receive the JigAdmin main window (Figure 3), from which we control the server configuration (Figure 4).
Now that the JigAdmin server is running, we can access it with the following command:
% java org.w3c.jigadmin.Main [-root root] [url]
The default root is your current directory. So if you are in the same directory where you started Jigsaw, you do not need the -root option. If you are running the administration server on the same machine, using the default port 8009, you do not need to provide a URL; it is the administration server's. However, if you are not in the root directory, you can access the administration server with:
% java org.w3c.jigadmin.Main -root INSTDIR/Jigsaw/Jigsaw/
Jigsaw comes with a very organized and rich set of documentation that is divided into six sections:
A Quick Start document covering the basics on how to install and run the server.
A Basic Concepts document discussing Jigsaw's design, authentication and access control.
The Jigsaw Configuration Manual covers the basics of installing and running the server to descriptions of the most complex configurations you can do with Jigsaw.
A Frequently Asked Questions document that answers all the FAQs about Jigsaw and its use.
A Programmer's Documentation guide describing Jigsaw from a programmer's point of view and indicating how to extend it to fulfill your own needs.
A User's Guide.
W3C released a Jigsaw Proxy Package that is a ready-to-run Jigsaw server configured as a proxy server. It is configured with a pre-installed caching proxy module and comes with an HTTP/1.1 server and client. Jigsaw also supports SSL with Jigsaw-SSL 2.01 beta which is public domain software that allows Jigsaw to use iSaSiLk as an SSL-provider. IAIK Jigsaw-SSL provides a SSLv3 supporting extension to the W3C HTTP Jigsaw server architecture for dealing securely with any incoming client request. IAIK JigsawSSL has been updated to operate on W3C's Jigsaw version Jigsaw 2.0.1.
Jigsaw is not the sort of web server around which you would build an enterprise-level Internet presence. Nonetheless, if you are serious about staying ahead of the curve on web protocols and infrastructures, you will want to have a test-bed machine running Jigsaw.
W3C is responsible for overseeing web standards, and anyone wishing conformity with HTTP/ 1.1 and the upcoming HTTP-NG (Next Generation) will want to do some testing with Jigsaw, as the latest version is totally HTTP 1.1-compliant. I highly recommend trying it out.
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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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.
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