Archive for the ‘TECH ZONE’ Category


Posted: August 16, 2012 in TECH ZONE
  • Installing JDK 6
    • sudo add-apt-repository ppa:sun-java-community-team/sun-java6
    • sudo apt-get update
    • sudo apt-get install sun-java6-jdk
  • for ulimit

AWS Management tools

Posted: May 11, 2012 in TECH ZONE

AWS management can be done from both commandline and UI. AWS management console is the UI for managing the different services of AWS. In management console, all the configuration options are quiet simple just with few clicks.
AWS also offers commandline utilities to manage the instances, Beanstalk environments, RDS instances, Route53 DNS settings and more.

The commandline tools can be downloaded from the AWS downloads section –
Instructions on how to configure those tools successfully on to you local system can be found in readme.txt from the downloaded zip file., & AWs developer forums are good resources for updating your knowledge on AWS


Remove open jdk by looking into its rpm

  • #rpm -qa
After identifying the rpm for open jdk remove it by entering the below command with the rpm name at the end.
  • # rpm -e –nodeps java-1.6.0-openjdk-


Install Sun JDK 7 rpm – for updated java jdk checkout @

Install the downloaded rpm by entering the command

  • # rpm -ivh jdk-7u5-linux-x64.rpm

After installation please enter the command  ” java -version to check the installed rpm”

AWS Quick Reference

Posted: February 4, 2012 in TECH ZONE
  • Remote Login to a ec2 instance from linux terminal
    • #ssh -i  abc.pem  username@ipaddress.  //abc.pem is the private key for you keypair,  username can be ubuntu if its a Ubuntu instance & ec2-user  if its a Amazon Linux Machine.
  • To login to a ec2 instance from aws management console
    • Right click on the instance and select the option “connect”, which will ask you for the .pem file(private key).  //Windows systems are remotely logged in using RDP connection.
  • To create an duplicate ec2 instance, just right click on the instance and select the option “ Launch more like this“, which will create another instance but with custom options of instance type, zone, key-pair, security group etc.,
  • To create an AMI, to keep it as a template for future instance, just right click on the instance, and select the option “create Image(EBS AMI)”, which will create a AMI that can be used later to launch more instances with the similar settings.


Posted: May 16, 2011 in TECH ZONE
IBM Mainframe eServer zSeries 990
Mainframes Unique Features:
  • can store large volume of data.
  • High processing speed.
  • High computing capacity
  • Lakhs of users can be processed Concurrently
  • Virus Free Environment
  • Highly secured System
  • It can be Interfaced with any toher application like web enable Application or Data Ware Housing Application
> Mainframe Computers are produced by different companies
  1. HP
  2. BULL
  4. IBM
  5. IBM – 95% of the Mainframes projects are done on IBM Mainframes.
> IBM producing Mainframe Machines are   ES/9000( MVS OS),  ES/9221, s/390, z10
> Operating systems are MVS(Multiple Virtual Storage), MVS/ESA( Enterprise System Architecture), ZOS(Zero downtime Operating System.
> Applications of Mainframes
  • Banking Applications ( loans, cards processing system, daily transactions)
  • Financial Institutions
  • Insurance Institutions (automobile Insurance, Property Insurance, Health Insurance, re-insurance)
  • Retro Insurance Applications( insurance to Re-insurance)
  • Telecom Applications
  • Stock Trade ( buying,selling of shares, Brokerage calculations, Agent commission calculations)
  • Manufacturing (automobile, motors, electrical products, switches)
> Any Mainframe Application Mainly dividied into 2 types
  • Batch Process (uses  Cobol, JCL,DB2, VSAM)
  • Online Process (uses Cobol,JCL,DB2,VSAM,CICS.
> The different modules in Mainframes Course are
  • JCL
  • DB2
  • VSAM
  • CICS

so Lets Start with the COBOL Module. Its a 10 sessions course,  all documented in word doc and uploaded.

  1. INTRODUCTION  :  Mainframe-INTRO.docx
  2. COBOL SESSION1 : COBOL(s1).docx
  3. COBOS SESSION2:  COBOL(s2).docx