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PROD Support Hacks

PROD Support Hacks

Imagine a post major release days where you have pushed lots of new code into the prod servers and when we are on a development support for the release and being flooded with lot of issues.   Some times due to a minor or major bugs ( specially when you systems are of full Pub/Subs), then there could be slew of messages to all the systems. Or may be your integration interface rejected so many payload messages and they are ended in an error...
Nginx Installation in CentOS.

Nginx Installation in CentOS.

Nginx is another alternative to Apache HTTP server and gained popularity because of its lightweight nature and high performance. Prerequisites You need to be a user with root privileges. 1) Update your EPEL release packages to the latest stable version. sudo yum update -y 2) make sure you do not have Nginx installed already by running the version command. nginx -v if there's no output from above command, then proceed. if not you can remove by...
Jenkins Pipeline Script basics

Jenkins Pipeline Script basics

Let us discuss the basic skeleton of the basic skeleton of a Jenkins pipeline script. Jenkins pipeline script supports many powerful constructs like parallel execution,triggering multiple jobs in parallel or in series and efficient error handling etc by very simple workflow to complex delivery pipeline. Stage and Step are two area sections (or think as a task blocks) we arrange in various manners to build a delivery pipeline.   Stage - a...
How to embed python script in you bash shell script?

How to embed python script in you bash shell script?

SO you want to reuse a python code which is already written in your bash script ? Instead of writing the entire python code in shell script, you can embed python code inside the bash shell script using here doc. First lets write a working python code. To demonstrate, let me write a small piece of Python code that just simply gets the file properties of a given file name. $cat runPythonBash.py import os.path import...
Install Node.js

Install Node.js

In order to install Node.js on CentOS 7 , execute the following commands as root in the same order they are mentioned. 1. Go to the official site : https://nodejs.org/dist/ and goto the latest version directory. At the time of installation, Node version 12.16.1 is the latest. https://nodejs.org/dist/v12.16.1/node-v12.16.1-linux-x64.tar.gz 2) Open termional and download the latest Node.js(node-v12.16.1-linux-x64.tar.gz) executable to /tmp #...
MySql DB server installation

MySql DB server installation

Introduction This post will explain how to install MySQL ( Trademark of Oracle) on a CentOS 7 Opertaiong system. MySql is an opensource relational Database management system that manages its data with SQL ( Structured query language). Prerequisite to proceed with this installation is you should be a non-root user with sudo previlege on a centos & Box. CentOS 7 comes with a mariaDB as a default package ( which is a fork of...
setting up Multiple Java Environments

setting up Multiple Java Environments

Recently i was checking some java 11 features and had a requirement to test some code in Java 11 and later wanted to switch back to java 1.8. Below are the steps, i did my CentOS 7 system.  I have the current version set as below: 2.  I normally maintain my Environment variables in /etc/profile.d/setEnv.sh . Below are the contents cat'ed to the screen. ( Thanks to the stack overflow people for this shortcut to set...
IBM Integration Bus v10 Installation

IBM Integration Bus v10 Installation

Lets see the Installation process of IIB v10 Developer edition on CentOS Distribution.   Prerequisite   Download the latest version of IIBv10 for Linux64 bit Developer edition. user should have sudo or root permission.   Download the latest Binary : 10.0.0.16-IIB-LINUX-Developer.tar.gz ( which is the current version at the time of writing) .   a) copy the Binary tar.gz file which was already downloaded to the location :...