Troubleshooting issues in Oracle, RedHat Linux, Windows and lot more!.

1) Go to the Start Menu  2) Click on the Run   3) Type winver 4)Type systeminfo

If you need to upgrade a server running Windows Server 2008 R2 Standard to either the Enterprise, or Datacenter editions, it’s possible to do so online, without re-installing Windows. Open an elevated command prompt and type DISM /Online /Get-CurrentEdition.  This will return the current Windows version. Type DISM /Online /Get-TargetEditions to list the Windows editions to which this server can be upgraded. If you type DISM /Online /Set-Edition:ServerDataCenter you’ll get the message in the screenshot below.  This is because even if you’re using a KMS server for internal activation, you have to provide a product key.  Fortunately, Microsoft have a page that lists the KMS client setup keys  http://technet.microsoft.com/en-us/library/ff793421.aspx .  On this page you can find keys for Windows Server 2008 R2 Enterprise and Datacenter. Typing DISM /Online /Set-Edition:ServerDataCenter /ProductKey:xxxxxx will upgrade the operating system.  All that’s required to complete the

Windows Server 2008 R2 introduces a new command-line utility, DISM, the Deployment Image Servicing and Management tool.    One of DISM’s many useful features is the ability to use its edition-servicing commands to upgrade an R2 installation without requiring install media.  This is functionally equivalent to Windows Anytime Upgrade in a Windows 7 client install, and can be performed on both an online or offline image, and on both full Server and Server Core installations. Upgrades using the edition servicing method are quick, and don’t require a full reinstall of the operating system.  Deployed roles and features, and other characteristics (machine name, user and admin accounts, etc) are persisted forward.     Because the target editions are staged within the image, only the updates necessary to move from edition to the next are applied. The upgrade options are limited to edition families, and are irreversible – you can’t downgrade once you’ve gone up an edition.  Additionall

Oracle Network Configuration In its most basic form, Oracle uses three files (listener.ora, tnsnames.ora & sqlnet.ora) for network configuration. This article gives an example of each file as a starting point for simple network configuration. Assumptions Listener.ora Tnsnames.ora Sqlnet.ora Testing The example files below are relevant for an Oracle installation and instance with the following values. Parameter   Value HOST hostname ORACLE_HOME /u01/app/oracle/product/9.2.0 ORACLE_SID ORCL DOMAIN world Listener.ora The listerner.ora file contains server side network configuration parameters. It can be found in the "$ORACLE_HOME/network/admin" directory on the server. Here is an example of a listener.ora file from Windows 2000. LISTENER =   (DESCRIPTION_LIST =     (DESCRIPTION =       (ADDRESS_LIST =         (ADDRESS = (PROTOCOL = TC

In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software. Area Networks Networks can be categorized in several different ways. One approach defines the type of network according to the geographic area it spans.Local area networks (LAN), for example, typically span a single home, school, or small office building, whereas wide area networks (WAN), reach across cities, states, or even across the world. The Internet is the world's largest public WAN. One way to categorize the different types of computer network designs is by their scope or scale. For historical reasons, the networking industry refers to nearly every type of design as some kind of area network. Common examples of area network types are: LAN - Local Area Network WLAN - Wireless Local Area Network WAN - Wide Area Network MAN - Metropolitan Area Network SAN -

Control + Z  is used for suspending a process by sending it the signal  SIGSTOP , which cannot be intercepted by the program. While  Control + C  is used to kill a process with the signal  SIGINT , and can be intercepted by a program so it can clean its self up before exiting, or not exit at all. If you suspend a process, this will show up in the shell to tell you it has been suspended: [1]+ Stopped yes However, if you kill one, you won't see any confirmation other than being dropped back to a shell prompt. When you suspend a process, you can do fancy things with it, too. For instance, running this: fg With a program suspended will bring it back to the foreground. And running the command bg With a program suspended will allow it to run in the background (the program's output will still go to the TTY, though). If you want to kill a suspended program, you don't have to bring it back with  fg  first, you can simply do the command: kill %1 I

How do I copy Oracle Database from one server to another server? Defenitely there will be a need to copy Production Oracle DB at Demonstration/Training, QA/Acceptance or Development environment. Most of the times we will be using Oracle Export utility. step-by-step how to copy database to another server. Note: you may want to change DB name while copying it to another destination. This case does not change the procedure much and steps required to do so will be specially highlighted in the article. Also, you may want to change Oracle DBID of the Database. the reason is that Recovery Manager (RMAN) distinguishes databases by DBID, you could not register a seed database and a manually copied database together in the same RMAN repository. For changing Oracle DBID for a database please refer to the corresponding HOWTO. OK. Here we go. We will imagine a situation when you need top copy PRO (production) DB into TST (test) DB on test server... 1. Instance service creation. (If you