What is Cloud computing and how it works ?


Let's say you're an executive at a large corporation. Your particular responsibilities include making sure that all of your employees have the right hardware and software they need to do their jobs. Buying computers for everyone isn't enough -- you also have to purchase software or software licenses to give employees the tools they require. Whenever you have a new hire, you have to buy more software or make sure your current software license allows another user. It's so stressful that you find it difficult to go to sleep on your huge pile of money every night.
Soon, there may be an alternative for executives like you. Instead of installing a suite of software for each computer, you'd only have to load one application. That application would allow workers to log into a Web-based service which hosts all the programs the user would need for his or her job. Remote machines owned by another company would run everything from e-mail to word processing to complex data analysis programs. It's called cloud computing, and it could change the entire computer industry.
In a cloud computing system, there's a significant workload shift. Local computers no longer have to do all the heavy lifting when it comes to running applications. The network of computers that make up the cloud handles them instead. Hardware and software demands on the user's side decrease. The only thing the user's computer needs to be able to run is the cloud computing system's interface software, which can be as simple as a Web browser, and the cloud's network takes care of the rest.
There's a good chance you've already used some form of cloud computing. If you have an e-mail account with a Web-based e-mail service like Hotmail, Yahoo! Mail or Gmail, then you've had some experience with cloud computing. Instead of running an e-mail program on your computer, you log in to a Web e-mail account remotely. The software and storage for your account doesn't exist on your computer -- it's on the service's computer cloud.


What to do when Oracle XE is not starting after a reboot


What to do when Oracle XE is not starting after a reboot
When you install Oracle Xe on a windows machine (mainly server OS’s like Windows 2003) you may notice that the database is not always starting after a reboot. This ussualy happenes when the Oracle XE was installed under a different user than the one you are currently logged in as.
It is easy to start the database by going to Start-> All Programs -> Oracle Database 10g Express Edition – Run SQL Command Line and simply type “STARTUP”.

However, if you want to automate this process you can use the StartDB.bat.
1) Navigate to your Oracle XE directory (typically under C:\oraclexe\app\oracle\product\10.2.0\server\BIN)
2) Edit the StartDB.bat file – If the Oracle Service andthe listener is started you can delete the first two lines (net start OracleXETNSListener and net start OracleServiceXE) and save the file.
3) Go to Start > All Programs > Accessories > System Tools > Scheduled Tasksand Use the Windows Scheduler to execute the batch file “When my computer Starts”.
Oradim messages are not displayed in the command prompt (you can still find the results in oradim.log under C:\oraclexe\app\oracle\product\10.2.0\server\database) so it might be wise to try the command first using the command prompt.
If you get ORA-01031: insufficient privileges when you trying to start the db (you probably will if you are logged on as different user than the user who installed Oracle XE) all you need to do is add the user to the ORA_DBA windows group.
1) Right click on My Computer and click Manage.
2) Navigate to Local Users and Groups and click on Groups.
3) Double click on the ORA_DB group and add the user you are currently logged in as.
4) Re run the oradim -startup -sid XE -starttype inst > nul 2>&1 to verify that it works.

Notepad++


Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPLLicense.
Based on the powerful editing component Scintilla, Notepad++ is written in C++ and uses pure Win32 API and STL which ensures a higher execution speed and smaller program size. By optimizing as many routines as possible without losing user friendliness, Notepad++ is trying to reduce the world carbon dioxide emissions. When using less CPU power, the PC can throttle down and reduce power consumption, resulting in a greener environment.
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Notepad++ v6.1.4 enhancement and fixed bugs:

  1. Fix a crash issue of Windows 8's Computer Manager due to Notepad++'s Shell Extension (Explorer's context menu).
  2. Work around for a right click issue (crashing on right click) in Windows Explorer in all versions of Win 7 and Vista. Issue was caused by a conflict among Shell Extension (Explorer's context menu) of Symantec Antivirus, Net iD component and Notepad++.
  3. Fix a regression in clickable link feature.
  4. Add "reload from disk" command entry in tab context menu.

Included plugins (Unicode)

  1. Spell Checker v1.3.3
  2. NppFTP 0.24.1
  3. NppExport v0.2.8
  4. Plugin Manager 1.0.8
  5. Converter 3.0

Learn the Netstat Command To Understand Your Internet Connections Better

Who is connecting to my computer ? Why is my PC suddenly transferring so much data ? Where is it sending the data to ? Are there some zombie process or spyware running in the background that's actively making connections to the internet without my knowledge ? Why did my internet connection get so slow ?

If you are connected to the internet and any of the above questions trouble your mind, all you need to do is learn Netstat [network statistics], a hidden DOS Command that helps you keep an eye on your internet and network connections (both incoming and outgoing)

You can run the netstat command from directly from DOS command prompt window. We will not go into any technical details but directly jump to practical examples of using the Netstat command in real world situations:

How do I know who is connecting to my computer from the internet ?

netstat -p TCP

To display a list of external machines (IP address or Machine names with Port Number) that your computer is connnected to. If you wish to display the foreign address only in numeric form, append the -n switch.

I think a virus or trojan on my computer is sending data to the internet ? Can I confirm this

netstat -e 10

This command displays the number of bytes sent and received in real time. The command loops after every 10 seconds to give you an idea of how much data is being transferred and at what rate. If you are not transferring a file over the internet but still large data is being sent across, that signals a problem.

Which program(s) on my computer are making active connections to the internet ?

netstat -p TCP -b

This command displays the list of software executable (like Firefox.exe) that are connecting to the internet. It will also show which websites (or IP address) they are connecting to and what is the status of the connection.

ESTABLISHED - Both hosts are connected.
CLOSING - The remote host has agreed to close its connection.
LISTENING - Your computer is waiting to handle an incoming connection.

I am downloading an illegal file over a torrent network. Will others come to know about my activity ? 

Absolutely, they can run the netstat command on their own machines and your computer's IP address would appear in the command's output. Any IP address can be easily traced to a physical geographic location of the computer with a little help from the ISP.

I have subscribed to a fast broadband internet connection but the data transfer rate sometimes drops down to 0 kbps. Why ?

Run the netstat command with the -b switch and look for values under the column "state" - If you see a lot of active connections with TIMED_WAIT status, that may be holding down the speed of your internet transfer. Kill the culprit process(es) from the Task manager or if it's an essential process, restart the computer.

To learn more about the netstat command, type netstat /? at the command prompt to see a detailed help page.

Process Explorer v15.21


Ever wondered which program has a particular file or directory open? Now you can find out. Process Explorer shows you information about which handles and DLLs processes have opened or loaded.
The Process Explorer display consists of two sub-windows. The top window always shows a list of the currently active processes, including the names of their owning accounts, whereas the information displayed in the bottom window depends on the mode that Process Explorer is in: if it is in handle mode you'll see the handles that the process selected in the top window has opened; if Process Explorer is in DLL mode you'll see the DLLs and memory-mapped files that the process has loaded. Process Explorer also has a powerful search capability that will quickly show you which processes have particular handles opened or DLLs loaded.
The unique capabilities of Process Explorer make it useful for tracking down DLL-version problems or handle leaks, and provide insight into the way Windows and applications work.
process explorer

process explorer


Download Process Explorer

Free software for finding details of CPU (CPU-Z)

free cpu details

What is CPU-Z

CPU-Z is a freeware that gathers information on some of the main devices of your system.
CPU

  • Name and number.
  • Core stepping and process.
  • Package.
  • Core voltage.
  • Internal and external clocks, clock multiplier.
  • Supported instruction sets.
  • Cache information.

  • Mainboard
  • Vendor, model and revision.
  • BIOS model and date.
  • Chipset (northbridge and southbridge) and sensor.
  • Graphic interface.

  • Memory
  • Frequency and timings.
  • Module(s) specification using SPD (Serial Presence Detect) : vendor, serial number, timings table.

  • System
Windows and DirectX version.


Download links

Create an all-in-one Windows 7 install disk


With the help of the WinAIO Maker Professional tool you can make a master copy of your Windows 7 disk that contains all the available editions.

You are probably tired of carrying around multiple editions of Microsoft Windows 7 when servicing PCs for your clients or users. Instead, make a master copy of your Windows 7 disk that contains all the editions you need. It’s simple, really. All it takes is a quick tool download, a disk rip, a setup modification, and a save to a DVD or thumb drive.
Every Windows 7 install disk includes all the editions of the operating system, the editions not pertinent to the purchased copy are merely hidden from view. For that reason, one disk from any edition (Home Basic, Home Premium, Professional, and Ultimate) will suffice for this procedure. However, if you want to combine x86 and x64 versions of Windows 7 together as well, you must have disks for both x86 and x64 versions of Windows 7 handy.
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