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PayPal Java SDK Complete Example – How to Invoke PayPal Authorization REST...
PayPal is one of the best online Payment transfer service out there. There is no doubt it’s growing day by day with crazy numbers. I personally have hands on experience with PayPal Java Developer APIs...
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Ansible: How to Execute Commands on remote Hosts and get command result (log)...
On Crunchify, we have published quite a few Ansible articles before which includes, installation of Ansible, Copying file from one host to remote host and more. In this tutorial we will go over steps...
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WordPress Fastest Social Sharing Plugin (Crunchy Social) – Developed by team...
We are pleased to announce our brand new super fast WordPress plugin Crunchy Social. It’s a time for all of us to rethink about Social Media sharing plugin. We have published an article last year...
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What is Lock(), UnLock(), ReentrantLock(), TryLock() and How it’s different...
In this tutorial we will go over Lock(), UnLock(), ReentrantLock(), TryLock() and how it’s different from Synchronized Block in Java. If you have also below questions then you are at right place....
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How to install and configure Filebeat? Lightweight Log Forwarder for Dev/Prod...
Over last few years, I’ve been playing with Filebeat – it’s one of the best lightweight log/data forwarder for your production application. Consider a scenario in which you have to transfer logs from...
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How to Install and Configure Elasticsearch on your Dev/Production environment?
In this tutorial we will go over steps on how to install and configure Elasticsearch for your development and production environment. What is ElasticSearch? One of the best search and analytics engine...
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How to fix “java.lang.RuntimeException: can not run elasticsearch as root”...
Are you getting below exception while running ElasticSearch? java.lang.RuntimeException: can not run elasticsearch as root Why is it ElasticSearch is not allowed to run as root? Elasticsearch is a...
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How to create executable .jar file using Linux commands and without Eclipse...
So far for me it it was so easy to right click in Eclipse IDE and create executable .jar file with few simple clicks. Last week I had to create executable .jar file manually on my Digital Ocean node...
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Everything about Java12 – New Features, Security and Switch Expression...
On 19th March 2019 Java12 was released. As we know Java12 was part of rapid release, it was released just in 6 months after Java11 release. In this tutorial, we will go over all changes and new...
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How to install & setup Apache Tomcat server on Linux Ubuntu host [on Linode]
Setting up Apache Tomcat web server on publicly hosted Linux host is a best way to host your service. If you want to publish any Java application to world, you need public IP and hence public facing...
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How to Create Your Own Non-Blocking, Fixed Size Queue in Java? Same as...
If you don’t want to use Google Guava’s EvictingQueue external dependency in your Java Enterprise Project then you should consider creating your own non-blocking, fixed size queue. Basically we want...
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How to Style and Customize WordPress Comment Form? Plus, Modify appearance of...
comment_form() outputs a complete commenting form for use within a WordPress template. Most strings and form fields may be controlled through the $args array passed into the function, while you may...
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JVM Tuning: Heapsize, Stacksize and Garbage Collection Fundamental
Heap Size: When a Java program starts, Java Virtual Machine gets some memory from Operating System. Java Virtual Machine or JVM uses this memory for all its need and part of this memory is call java...
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Ads.txt (Authorized Digital Sellers) file and Google Adsense Revenue [All in...
Let me start with my recent experience with Ads.txt file. To be honest, I just came to know about it last week. It seems Ads is a short-name of Authorized Digital Sellers. It’s a new standard imposed...
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How to Start Stop Apache Tomcat via Command Line? Check if Tomcat is already...
Apache Tomcat (or simply Tomcat) is an open source web server and servlet container developed by the Apache Software Foundation (ASF). Tomcat implements the Java Servlet and the JavaServer Pages (JSP)...
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How to install Boto3 and set Amazon EC2 Keys? Boto: A Python interface SDK...
What is Boto? Boto is an Amazon AWS SDK for python. Ansible internally uses Boto to connect to Amazon EC2 instances and hence you need Boto library in order to run Ansible on your laptop/desktop....
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What is Ansible pre_tasks? How to Update OS, Install Python and Install JRE...
What is pre_tasks in Ansible? pre_tasks is a task which Ansible executes before executing any tasks mentioned in .yml file. Consider this scenario. You provisioned a new instance on Amazon EC2 cloud...
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Ansible – How to Grep (ps -few) and Kill any linux process running on Remote...
Ansible is pretty amazing system admin tool. We have published number of articles on Ansible in last few weeks on how to copy files on remote host, How to Execute Commands on remote Hosts, how to...
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How to Install, Setup and Execute 1st Amazon AWS CLI (Command Line Interface)...
There is no doubt Amazon AWS is the biggest public cloud provider out there. I personally started playing with Amazon AWS for few of Crunchify’s clients and I must say AWS is so flexible. I use my...
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How to Create, Start and Configure Amazon EC2 instance using simple Ansible...
Amazon AWS is no doubt the best public cloud out there. As we discussed in previous tutorials, Ansible is a very handy tool for sysops to maintain their company infrastructure. In this tutorial we...
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