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Shirish Ranjit

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Shirish Ranjit

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  • Home
  • About
    • A Brief Note on My Agile Journey
    • Interest in Solving Real “Business” Problem to build something that matters
    • News Clippings
    • Project Summary
    • Travel New England
      • Marth’s Vineyard Notes
  • Big Data
    • 7 Most Recommended Skills for would be Data Scientist
    • Access Control in Databricks
    • AI and Data Analytics
      • AI and ANN Cheatsheet
      • Automated Signature Matching Service
      • big data and Data Analytics – catalog
      • Machine Learning Languages
        • Natural Language Processing (NLP) open source tools Reference
        • Text Processing Primer
      • R and Data Analysis with Neural Network
      • Sentiment Analysis References
      • Why Bayesian Inference works in Real Life
    • All about AWS
      • Application in Cloud e.g. AWS (Amazon AWS )- what does it mean?
      • AWS Cloud Search in Five Minutes
      • AWS Lightsail
    • Apache and BigData
      • Apache ActiveMQ Lesson Learned
        • Apache ActiveMQ Temp Queue Deleted
      • Apache and BigData Links
      • Apache Big Data Initiatives
      • Apache Camel Exchange / ActiveMQ – publish to multiple end points
      • Apache Kafka – What is it
      • Apache Spark vs Apache Strom – which one to pick
      • Machine Learning, NLP, and Search Engine References
    • Application, System, Network Monitoring Practices
    • Big Data Analytics and Intelligence – Solution
      • BigData Analytics on Games
      • Search Data Analysis to find Pattern in travel
    • Big Data Software App References
    • Cassandra Writetimeout – What does it mean?
    • Clickhouse Cheatsheet
      • Apache Arrow Cheatsheet
      • Clickhouse CSV Upload Primer
    • Data and Databases
      • Oracle database not returning correct resultset
      • Oracle ORA-00600 Error
      • Simple Big Data Streaming Solution
    • Data Modeling Cheatsheet
    • Docker Primer
      • Docker – how to get hostname of the container/Docker host machine
      • Docker Build Tidbits
      • Docker How to set and unset environment variables in Linux
      • Docker Images Source Repository List
      • Docker in AWS with ECR
      • Docker installation Issues and resolution
      • Docker not deploying in Kubernetes with BackOff Error
      • Docker Runtime Behaviors
      • Is Kubernetes dropping Docker?
      • Oracle Cloud – setting up Oracle CLI and Kubernetes
      • Redhat ubi docker build fails with ‘cannot install the best update candidate for package
    • How to Operationalize Docker
    • HyperLogLog – what is it?
    • Improve your Application Support’s Productivity by using Elasticsearch, Logstash, and Kibana in 4 easy steps in an Hour
    • Kafka Primer
    • Kubernetes
    • Links to Big Data pages
    • Math Sites
    • Neo4j References
    • Oracle Cloud Networking References
    • Oracle Database – Pluggable Database
    • Oracle Database Optimizations for High Throughput
    • Peer-to-Peer (P2P) Networking
    • R CheatSheet
    • Scaling a System References
    • Spark CheatSheet
    • Twitter Development howtos
  • BlockChain
    • Blockchain Notable References
    • List of Patents on Blockchain
  • Blog Posts
    • General Interview Preparation
    • Meredith, NH
  • Databricks Primer
    • Databricks Performance Release 20211105
  • Distributed Systems
    • An example of Distributed System
    • Distributed Computing System
    • Home Networking How To
  • Entrepreneurship
    • Heilmeier’s Catechism
    • Home Office Stuff
    • Interesting way to calculate Salary for a startup
    • Project Management
    • Top Startups
  • Fintech
    • Making systems Straight Through Processing (STP)
    • Margin Computation Technology Products
    • NBA Analytics
    • Resources on Foreign Exchange Trading and Software Solution
    • What is Algorithmic Trading?
  • Future of Work
  • General Technical Posts
    • Algorithmic complexity
    • Apache Httpd Setting up Multiple webserver Config changes
    • Apache Solr Search Engine
      • Apache Solr Commits
      • Apache Solr deploy in JBoss a.k.a. Wildfly
      • Apache Solr Primer – Quick Start Guide
      • Apache Solrj RemoteException – missing content stream
    • Architecture Frameworks
      • Enterprise Architecture References
    • Basic Software Baselining Test
    • Circular References (Self References)
    • Clearcase Unable to logon to ClearQuest user database
    • Client-Server Pagination
    • Crypto —
    • CURL Open SSL ERROR – How to Fix
    • Data Integration with DBT
    • Git Cheatsheet
      • Continuous build deploy with github and Jenkins
    • How to integrate Ant with Tomcat
    • How To Software Package Design
    • JavaScript World
      • AngularJS ngGrid – example
      • AngularJS References
      • Building Responsive UI Application
      • Java Script Library Debate
    • JBoss – Wildfly
      • How to add Datanucleus Module in Wildfly
      • Setting up Data source in Wildfly
    • Jira References
    • Linux Tidbits
      • Backing up your data with rsync in Mac and Linux
      • Gettting Remote Access to Ubuntu
      • Installing Enterprise Architect in Ubuntu
      • Installing Ubuntu on your Windows Desktop few Hiccups
      • Instilling Ubuntu in a Windows Laptop
      • Intel Python 3.5 in Debian Linux without Apt-get
      • Linux commands
      • Linux Grub boot loader dual boot windows does not show up – Solved
      • Setting openvpn server in Ubuntu
      • Ubuntu Git pull or push or fetch does not work
      • Updating NVIDIA Graphics Driver in Linux (Ubuntu 14.04)
      • Yum Error: Unable to read consumer identity
    • Mac OS X Tidbits
      • Apple G5 – How to fix boot problem
      • Apple Mac Mail Program Crash – how to fix it
      • How to Remove SearchMine and MyComponent Virus in Chrome in Mac
      • iTunes for Mac: Moving your iTunes Media folder
      • Mac OS X References for Restart
      • Mac OSX Security update blocked Java Applet – Work around
      • Mac OSX Yosemite iTunes cannot play Video
      • Macbook air does not boot – How to fix
      • Macbook Pro gray or white screen at boot or startup
      • MacBooks Blue screen or Gray screen of death – Fix
      • OS X update crashes Word & Power Point
        • How to Change a startup disk in Mac in Command line
        • Mac OS X Single user mode and Mounting USB drive
    • Maven
      • Building OSGI Bundle with Maven Bundle Plugin
      • Maven – Creating new project
      • Maven Compilation Error: Use -source 7 or higher to enable diamond operator
      • Maven Single Jar Example
      • Setting up Build for your project with Maven and Jenkins
    • Multi-Tenancy Reference
    • Object Oriented Programming
    • Object Storage Design Principles
    • Plone upgrade or migrate – How to
    • Postgres Database Setup/Upgrade and Start/Stop Cheatsheet
      • Managing Postgresql Users, Roles, and permissions
      • Postgres Query taking too long
      • Postgres SQL Cheatsheet
      • Postgresql Commands
      • Postgresql Upgrade – How To
    • Regular Expression
    • Review of Mathematical Modeling of Infectious Disease in Light of CovID 19
    • Service Oriented Architecture (SOA) Primer
    • Software Architectural Diagramming Tools
    • Software Development
      • Dependency Injection
      • Software Architecture – Micro-Service and Component Architecture as Service
      • Test Driven Software development process
    • Software Performance by Design
    • Solr Faceted Search Primer
    • Sorting and Searching Algorithms
    • Talk about Auto
    • The Properties of Engineering Systems ( a.k.a “-ilities” )
    • Webservice Topic
      • SOAP and XML
      • Step by Step example to build REST Service with JAX-RS
      • Webservices and HTTP and Security References
    • yahoo-performance-rules
    • How to Setup Mesh Wifi Network
  • Google Technology
    • Chrome Remote Desktop Connection time out
    • Google App Engine
    • Google App Engine 1.2.6 Error Running in Eclipse with Older version Projects
    • Google App Engine Datanucleus Enhancer – Nullpointer
    • Google App Engine: Memcache – How can you create a multiple Memcache?
    • Google AppEngine and DataNucleus Enhance – Encountered a problem: Unexpected exception
    • Setting up MX records for G Suite Gmail
  • Human Machine Interface (HMI)
    • HMI Related References
    • How to Reset Maintenance Light in Toyota Sienna 2012 Model
    • Journals and links
    • Remote Car starter – VOXX model APS57E
    • Signature Verification through Automated Signature Matching
    • Why does the humidifier make a stove’s flame orange?
  • iPhone Development
    • Apple iApplication how to build and sell Primer
    • idevice upgrade issue
    • iPhone Compile Error accessing unknown component of a property
    • iPhone Managed Objects – Can’t find model for source store
    • Max OS X terminal commands
    • Pearls of Objective-c NSMutableDictionary (iPhone Development):
    • Syncing Google Calendar to your IOS Device
    • xcode 4.2 and IOS 4.2 — iPhone 3G
  • Java References
    • An example of an Abstract Model
    • Apache log4j DailyRollingFileAppender
    • Collection Discussion
    • Database Connection Pooling with Oracle DataSource in Java
    • Faster Parallel Processing in JAVA
    • HashMap – Unintended consequence in Multi-threaded environment – HashMap Degeneration – How can it happen?
    • How to build a Java OS X application
    • Is Java More Secure than C?
    • Java and Java Language Performance
    • Java and Threads – how they work
      • Java Thread Fork-Join Summary
    • Java JAXB unexpected element
    • Java Monitoring and Management
    • Java Performance Turning, JVM, Garbage Collection, Memory Management Refereces
      • Java JVM and JMX Parameters
    • Java Persistence API – EntityManager
      • Does hibernate for j2ee application server work?
      • HibernatePersistenceProvider threw unexpected exception at create EntityManagerFactory with java.lang.NoSuchMethodError
      • JPA Persistence Error – Could Not Extract ResultSet or ERROR: relation does not exist
      • org.hibernate. QueryParameterException: could not locate named parameter
      • Primer on Building Java Persistence using Hibernate
    • Log4j and SLF4J getting StackOverflowError on startup
    • log4j2 Element Appenders NullPointerException – how to fix it
    • NON-Durable NON-Persistent JMS Topic Keeps Messages
    • OSGI (ServiceMix) – Fundamentals that You Should Know along with OSGI Singleton
    • Portable Object Format (POF)
    • Project with Wild fly
    • Singleton Design – a Short Primer
    • Spring and Its Framework EOSL Dates
    • Troubleshooting Guide for Java SE
    • Tuning Java Virtual Machine
    • ZipException – “invalid LOC header”
  • MLOps
    • MLFlow Primer
    • MLSecOps – BlackDuck Scanning
      • Software Vulnerability Primer
  • Python Primer
    • Conda and Miniconda installation and Install Error how to fix
    • How to Setup and Start your Python Application
    • Python and Pip – fixing Module not Found Error
    • Python Exception Handling
    • Python Loading Data into Pandas, Polars, and List Performance Benchmark
    • Strings in Python
  • ReactJS
    • Building UI with ReactJS
      • CORS header ‘Access-Control-Allow-Origin’ missing – Primer
    • ReactJS Button onclick function called on render
    • ReactJS component from controlled to uncontrolled explained

Setting openvpn server in Ubuntu

Ubuntu 14.04 instruction

Configuring a CISCO router for the vpn access. 

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