Browse » Home » All posts
As know in the Java Developers community, Java is a platform independent object oriented language which runs on every platform. That is why it is said for Java that “Compile once, run anywhere” language.
But when the term “anywhere” had been used, they must have some specific platforms described. If we are running Java Application on Linux then something arise in mind that which context and environment I’m into?
A Java developer new to Linux plat form may wonder about whether or not and if yes then how Java can find the environment on Linux platform? In particular four things to get on Linux platform:
- Command-line parameters
- Current shell’s environment variables
- Location of data files
- Current working directory
The answer to all these factors varies on different cases like of which kind your Java application would be and how portable you want Java application to be.
The basic external information is supplied by program invocation. It may be simple parameters or arguments. This information can direct a program to flexibility and execution.
Command-Line Arguments
When a program is run from the command line, more than just the program name can be supplied. Here are some examples:
$ javac example.java
$ mv Acct.java core/Account.java
$ ls –l
In the ?rst example, we invoked a program called Javac and gave it the parameter example.java, the name of the ?le containing the Java program that we want Javac to compile to Java byte code The mv got two commandline arguments, Acct.java and core/Account.java, which look a lot like pathnames. The ls command has one argument, -l, which in Linux usually indicates, by its leading minus sign, that it is an option for altering the behavior of the command.
Browse » Home » All posts
This might be the best kept secret ever. I can't believe that this is not more known to the public. That's why I want to share this with you. Sybase released Sybase ASE 15 Express. Free to use on Linux. The restrictions to use it for free are well in the limits of most MySQL databases running millions of websites.
PHP has a very nice integration into Sybase ASE. Combine the popularity of Linux and Apache with the free Sybase ASE, you get a powerful combination. How many times did you hear the MySQL problems when the database all a sudden grows beyond what MySQL can handle. These are costly migration projects or you're force to buy SUN's support package.
When using the free Sybase ASE 15 for Linux there is nothing more to do than to buy an inexpensive small business license if you grow beyond the free license restrictions and you will never miss a beat.
So, dump your MySQL for a way more powerful Sybase ASE 15.
On another note, I am following a discussion on a LinkedIn group called Sybase DBA Network. There's a lot of talk about how Sybase should increase their market shares. I am following this discussion for a while now and I read a lot about how little resources are available on the internet. I must agree that the results for a Sybase search term are not as plentiful as when searching for Oracle or SQL server. But to be fair, most Oracle results on a search term are redundant entries on a many websites. The only way to change this is for Sybase DBA experts to be more outgoing and share their knowledge on blogs and forums.
Actually in this economy, being more visible to the public and demonstrating your skills could make the difference when searching for your next job.
This is a call for action to all Sybase DBA to contribute the global tribal knowledge of Sybase on the internet. If you don't know where to post your knowledge, contact me.
- Peter
- Peter
Peter Dobler, founder and owner of Dobler Consulting Inc, who has over 20 years of database management and data migration experience. He and his company are committed to provide turnkey data migration project management and data migration execution to delight its customers. Read more about Peter Dobler a |
Browse » Home » All posts
8 Linux System Admin Training - Free Linux Training (via Free Documentation) Vs Linux Training Videos
There is free Linux documentation available on the Internet at lots of web sites and in free ebooks - but what's your time worth?
Linux Commands Training Tips: The Linux System Administration concepts, commands and tasks covered here apply to ALL distributions (versions), including: Red Hat, Fedora, Ubuntu, Kubuntu, Edubuntu, Slackware, Debian, SUSE and openSUSE.
By Learning How to Use Linux with Free Documentation - You Get Free Frustration!
You can go to lots of Linux web sites and get free bits and pieces of information on concepts and commands - and then try and put these pieces together to learn Linux. However, this info is often poorly written, highly complex, quite dated and sometimes wrong!
Free Linux documentation is usually written by well-meaning individuals that have no experience in communicating to people who are completely new.
These free training materials are usually written by someone who is already "there" and understands Linux, and so this free info is written from that perspective.
Even though it may say otherwise, most free information has been written from the perspective of someone who already understands how to use Linux. Someone who, along the way to get "there" - has forgotten "how" to get "there" - and can't explain the steps that are missing.
As a result, vital basic concepts are totally overlooked in these Linux training materials. This type of "free" info often starts at an intermediate level - and gets more complex from there!
Linux Training Tips: Free training materials are sadly lacking in the simple concepts that are required for understanding how to use Linux. And there is no foundation of concepts on which to build.
What you need to do is learn Linux the easy way, with training videos that create a strong foundation of concepts and commands - and then build on this foundation to provide a clear path to understanding Linux from an intro level through to advanced levels.
You need Linux training materials that have been written by an experienced trainer that can take the "geek-speak" and translate it into plain English!
And now I would like to offer you free access to my Linux Commands Training Mini-Course, a 7 Lesson, Daily Mini-Course, including the free Linux Commands ebook and Linux audio podcasts - showing you how to get started learning how to use Linux commands
Browse » Home » All posts
href="file:///C:%5CUsers%5CWR%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_themedata.thmx" rel="themeData"href="file:///C:%5CUsers%5CWR%5CAppData%5CLocal%5CTemp%5Cmsohtmlclip1%5C01%5Cclip_colorschememapping.xml" rel="colorSchemeMapping">
One of those choices is Ubuntu Linux, a greatly enhanced Debian-based Linux distribution that installs easily, has the familiar Windows look and feel, and operates well on older hardware (expensive upgrade not required). Linux fans tout the positive attributes, often at high decibel levels, of Ubuntu Linux, which is perhaps the world's most popular Linux distribution. But, is it business worthy?
Let's first consider Ubuntu as a replacement for your Windows desktop or laptop operating system(sony battery). Computer owners generally use an Internet browser, a word processing program, the occasional spreadsheet, an email application and almost nothing else. These computer owners may not realize that they're paying $150 to $300 for the OS and another $300 or more for the office suite--most of which they'll never use. Why add hundreds of dollars to a computer system that has a life expectancy of three to four years? Software costs often exceed hardware costs by two or three times. Small businesses resort to piracy or doing without needed software to compensate for those costs. Neither is a good choice.
The alternative puts you at odds with the accepted philosophy that Windows is your only choice for desktop computers and servers. The Linux concept requires that you step outside the standard box that Microsoft has placed you in, and realize that you have a choice that makes sense for you, your bank account, and your business.
Your Windows computers need an anti-virus program that hinders performance, anti-spyware software that you have to run manually to scan for all the nasties that invade your computing habitat, and a personal firewall to ward off those over-the-network attackers.
Alternatively, Ubuntu is free. You can download any version of it and use it for any purpose. Upgrades are also free. There's no need for any anti-virus software or anti-spyware applications on Linux, which comes with a personal firewall, if you want to use it.
Linux also comes to you with a free office suite, OpenOffice.org that includes Microsoft-compatible applications. They look and behave so much like Microsoft's office suite that you may never realize any difference between the two.
Ubuntu comes standard with thousands of free applications on the installation CD and in the Ubuntu software repository. Unless there's some compelling application that you're required to purchase, you'll never spend a penny on software for your business systems. That's correct, you can use Ubuntu and all the available software without paying anyone for it. Further, the software is open source, which means that you can look at and change the code for any purpose-even to resell it as your own. That goes for the Linux code and most software programs that you install on a system. Individual software applications have their own licensing and restrictions.
For business owners who fear the word "free" for business-critical applications and continuity, Ubuntu Linux has commercial support available from the company that sponsors it: Canonical. Canonical and Ubuntu are the entrepreneurial ventures of Mark Shuttleworth, the South African businessperson who also founded Thawte, an Internet security company, and started the Ubuntu project to help everyone in the world have access to free computing software. He founded Canonical to support Ubuntu Linux for those who wish to purchase support for Ubuntu. Like most commercially supported Linux distributions, Ubuntu's support is subscription-based. Canonical also offers training courses and consulting services to their corporate clients.
Ubuntu has a version that's right for all aspects of your business. There are Ubuntu versions for netbooks, desktop computers, servers and cloud computing needs. The cloud computing Ubuntu, known as Ubuntu Enterprise Cloud (UEC), ties in closely with Amazon.com's Elastic Compute Cloud platform (EC2).
Canonical releases major versions of Ubuntu every six months in April and in October of each year. Every two years, Canonical releases a Long Term Support (LTS) version. Canonical supports the LTS versions for five full years with updates, security fixes and upgrades-all free of charge.
If you're tired of vendor lock-in, major hardware upgrades with each new version's arrival, high support costs, and runaway software prices, Ubuntu makes sense for you and your business. Ubuntu, Canonical and your business make the perfect team and create the perfect environment to protect you and your customers(SONY VAIO VGN-P70H/W battery)
Let's first consider Ubuntu as a replacement for your Windows desktop or laptop operating system(sony battery). Computer owners generally use an Internet browser, a word processing program, the occasional spreadsheet, an email application and almost nothing else. These computer owners may not realize that they're paying $150 to $300 for the OS and another $300 or more for the office suite--most of which they'll never use. Why add hundreds of dollars to a computer system that has a life expectancy of three to four years? Software costs often exceed hardware costs by two or three times. Small businesses resort to piracy or doing without needed software to compensate for those costs. Neither is a good choice.
The alternative puts you at odds with the accepted philosophy that Windows is your only choice for desktop computers and servers. The Linux concept requires that you step outside the standard box that Microsoft has placed you in, and realize that you have a choice that makes sense for you, your bank account, and your business.
Your Windows computers need an anti-virus program that hinders performance, anti-spyware software that you have to run manually to scan for all the nasties that invade your computing habitat, and a personal firewall to ward off those over-the-network attackers.
Alternatively, Ubuntu is free. You can download any version of it and use it for any purpose. Upgrades are also free. There's no need for any anti-virus software or anti-spyware applications on Linux, which comes with a personal firewall, if you want to use it.
Linux also comes to you with a free office suite, OpenOffice.org that includes Microsoft-compatible applications. They look and behave so much like Microsoft's office suite that you may never realize any difference between the two.
Ubuntu comes standard with thousands of free applications on the installation CD and in the Ubuntu software repository. Unless there's some compelling application that you're required to purchase, you'll never spend a penny on software for your business systems. That's correct, you can use Ubuntu and all the available software without paying anyone for it. Further, the software is open source, which means that you can look at and change the code for any purpose-even to resell it as your own. That goes for the Linux code and most software programs that you install on a system. Individual software applications have their own licensing and restrictions.
For business owners who fear the word "free" for business-critical applications and continuity, Ubuntu Linux has commercial support available from the company that sponsors it: Canonical. Canonical and Ubuntu are the entrepreneurial ventures of Mark Shuttleworth, the South African businessperson who also founded Thawte, an Internet security company, and started the Ubuntu project to help everyone in the world have access to free computing software. He founded Canonical to support Ubuntu Linux for those who wish to purchase support for Ubuntu. Like most commercially supported Linux distributions, Ubuntu's support is subscription-based. Canonical also offers training courses and consulting services to their corporate clients.
Ubuntu has a version that's right for all aspects of your business. There are Ubuntu versions for netbooks, desktop computers, servers and cloud computing needs. The cloud computing Ubuntu, known as Ubuntu Enterprise Cloud (UEC), ties in closely with Amazon.com's Elastic Compute Cloud platform (EC2).
Canonical releases major versions of Ubuntu every six months in April and in October of each year. Every two years, Canonical releases a Long Term Support (LTS) version. Canonical supports the LTS versions for five full years with updates, security fixes and upgrades-all free of charge.
If you're tired of vendor lock-in, major hardware upgrades with each new version's arrival, high support costs, and runaway software prices, Ubuntu makes sense for you and your business. Ubuntu, Canonical and your business make the perfect team and create the perfect environment to protect you and your customers(SONY VAIO VGN-P70H/W battery)
Browse » Home » All posts
When trying Ubuntu especially if it's your first experience with Linux, there might be times that you just can't stand a certain application or program. You might not like how it works or how it looks. Maybe it feels too different from what you are used to on your Windows machine or your Mac. There is a simple solution to this if can't stand on the applications.
One of the big advantages of using a Linux distribution like Ubuntu is that there are thousands of applications to choose from. The only thing that makes Ubuntu what it is would be the selection of applications for that specific distribution. If you don't like something, whether it's a program or interface, you can change it.
In Ubuntu there is something called the Synaptic Package Manager. This program will let you search for other open source software. If you hate the text editor, browser, paint program, or anything else, search for an alternative. For most common desktop applications there will be a wide variety of alternatives to download, test out, and use for free.
If you don't like the way Ubuntu looks, download and try Kubuntu or Xubuntu as these run different programs to have a completely different interface. These also come with a different set of applications to do basic computer tasks. Kubuntu for example comes with KDE and runs a wide variety of "K" applications that will be different than the ones in other versions of Ubuntu.
Before making up your mind about Ubuntu or any other distribution of Linux, realize that the system is extremely flexible and does allow for changes to be made on almost any level.
Besides writing informative technology and computer articles Lance also writes on jewelry and fashion like the Brass Knuckles Necklace and Brass Knuckles Pendant accessories.
Browse » Home » All posts
ubuntu |oǒ'boǒntoō|
Ubuntu is an ancient African word meaning 'humanity to others'. It also means 'I am what I am because of who we all are'. The Ubuntu operating system brings the spirit of Ubuntu to the world of computers.
Where did it all begin?
Linux was already established as an enterprise server platform in 2004. But free software was still not a part of everyday life for most computer users. That's why Mark Shuttleworth gathered a small team of developers from one of the most established Linux projects – Debian - and set out to create an easy-to-use Linux desktop, Ubuntu.
The vision for Ubuntu is part social and part economic: free software, available free of charge to everybody on the same terms, and funded through a portfolio of services provided by Canonical.
Ubuntu releases
The Ubuntu team broke new ground in committing to a programme of scheduled releases on a predictable six-month basis. It was decided that every fourth release, issued on a two-year basis, would receive long-term support (LTS). LTS releases are typically used for large-scale deployments.
Ubuntu is different from the commercial Linux offerings that preceded it because it doesn't divide its efforts between a high-quality commercial version and a free, 'community' version. The commercial and community teams collaborate to produce a single, high-quality release, which receives ongoing maintenance for a defined period. Both the release and ongoing updates are freely available to all users.
Governance
Version 4.10, codenamed the 'Warty Warthog', the first official Ubuntu release, was launched in October 2004. Global interest in Ubuntu was dramatic from the outset. The year following the Warty Warthog release saw huge growth in the Ubuntu community as thousands of free software enthusiasts and experts joined.
The governance of Ubuntu is somewhat independent of Canonical, with volunteer leaders from around the world taking responsibility for many of the critical elements of the project. It remains a key tenet of the Ubuntu Project that Ubuntu is a shared work between Canonical, other companies, and the thousands of volunteers who bring their expertise to bear on making it a world-class platform for the whole world to use.
Ubuntu today
The first version of Ubuntu was based on the GNOME desktop. We have since added a KDE edition, Kubuntu, and a server edition. All of the editions of Ubuntu share common infrastructure and software, making Ubuntu a unique platform that scales from consumer electronics to the desktop, and into the cloud for enterprise computing. Developers can work on their desktop of choice, and smoothly deliver code to cloud servers running the stripped-down Ubuntu Server Edition.
In recent years, special emphasis has been placed on netbooks for lightweight, connected, mobile computing, and on the cloud as a new architecture for data centres. Ubuntu is a pioneer in both fields, with Ubuntu Netbook Edition and Ubuntu Enterprise Cloud setting the standard for easy deployment and management. Ubuntu is hugely popular on Amazon's EC2 and Rackspace's Cloud, and is pre-installed on computers from Dell, Lenovo and other global vendors.
Ubuntu still is and always will be free to use, share and develop. We hope it will bring a touch of light to your computing – and we hope that you'll join us in helping to build the next version too.
Browse » Home » All posts
VirtualBox is a free program that allows you to install another operating system on top of your base operating system. It is a convenient option for those who, for example, want to use programs that require other operating systems but have only one computer. In this article I will show you how to install a free operating system called Ubuntu.
First go to virtualbox.org to download an appropriate version for your computer. Install following onscreen instructions. Next, download Ubuntu. Don't do anything with the downloaded.iso file yet, just save it to someplace you can remember.
Now we're going to set up a new virtual machine. Open VirtualBox if it isn't already open and select the "New" button. This will open an installation wizard. Use the "Next" button to proceed. Name your virtual machine Ubuntu or anything you like, but it's advisable that it's something sensible. Then choose what type of operating system you'll be installing (choose Linux). Hit "Next". Choose the amount of memory that will be used by Ubuntu virtual machine. VirtualBox should recommend an appropriate amount (you can choose the amount you want but it may be best to stick to what is recommended). Hit "Next".
Now, you're going to make a virtual hard disk. Follow the instructions to another wizard that will help you do this. When you get there you can choose to have a "Fixed-Size Storage" or "Dynamically Expanding Storage". It all depends on what you want. If you make it a fixed size, you can only create or download files on Ubuntu up to that fixed limit. Expanding storage means that you start out with the file size of Ubuntu itself and it grows until your physical hard drive is full. Hit "Next" to accept what you've done. Then click finish to create the virtual hard disk. Then hit finish again to confirm and create your virtual machine.
Now we're going to set up the virtual machine to boot from the Ubuntu.iso file. Choose your virtual machine you created and click "Settings". Hit "CD/DVD-ROM". Tick the check-box for "Mount CD/DVD-ROM". Select "ISO Image". Then you should see a folder that opens the Virtual Media Manger, click it. Click "Add". Browse for the Ubuntu.iso where you saved it. Hit "Open". Hit "Select" and then "OK".
Now select the virtual machine you created and hit "Start". There will be mention of "Auto capture keyboard"... read the message and click "OK". There may be mention of a screen mode... read and click "OK". After this follow the onscreen instructions to install Ubuntu. Remember that the "disk" mentioned in the installation refers to the VirtualBox virtual hard disk that you created for Ubuntu. So when the installer talks about using the whole hard drive, it's referring to the virtual hard disk.
If you've followed all the instructions properly, you should have Ubuntu running on top of your native operating system in no time. Now you can do all sorts of great things with this setup. You can run Linux applications on your, let's say, Mac. Or you can do even cooler stuff like get a US IP address for your PS3 to access movies and TV shows (see resources below).
If you need any further tips about the Ubuntu installation process, see the resources below.
Langganan:
Postingan (Atom)
