This article will help you to install Maven on Linux Operating System. What is Apache Maven? Apache Maven is a software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project’s build, reporting and documentation from a central piece of information. Prerequisites: Maven 3.3 requires…
1) How to stop all docker containers?docker kill $(docker ps -q) 2) How to stop docker containers and remove them?docker rm $(docker ps -a -q) 3) How to remove all Docker Images?docker rmi $(docker images -q) 4) Remove all exited containersList: docker ps -a -f status=exitedRemove: docker rm $(docker ps -a -f status=exited -q) 5)…
Here are the couple of methods to check if a string contains a substring in bash shell script. Methods to check if string contains a substring in Bash Method 1: Use regular expression Output: Method 2: Use wildcard (*) to check the string Output:
How to check if a directory exists in a bash script? In shell script implementation you might come across use case where you need to perform some operation in a directory, but what if directory is not present then your script might break. To avoid the failure and display user friendly error, we should validate…
Getting started with Elasticsearch What is Elasticsearch? Elasticsearch is a search server based on Lucene. It provides a distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents. Elasticsearch is developed in Java and is released as open source under the terms of the Apache License What is Apache Lucene ?…
What are the slow log settings in Elasticsearch? Elasticsearch provide facility to keep track of your slow queries while indexing and searching data. It helps us to identify the slow elasticsearch query. You can configure slow log threshold according to your requirement. Its just depends on your architecture. Sometimes 2s query are fine for us…
Post JSON data via PHP cURL We can Post JSON data via PHP curl by using header Content-Type: application/json in CURLOPT_HTTPHEADER. Below is working code demonstration of PHP curl with post json field. <?php $url = ‘http://yourdomain.com’; $jsonString = json_encode(array(“key” => “value”)); // You can directly replace your JSON string with $jsonString variable. $ch = curl_init();…
Check for Anagrams in Python Two strings are anagrams if they contain the same characters in the same frequency, just in a different order. For example, “listen” and “silent” are anagrams. Solution 1: Sort and Compare def is_anagram(s1, s2): return sorted(s1.lower()) == sorted(s2.lower()) print(is_anagram(“listen”, “silent”)) # True print(is_anagram(“hello”, “world”)) # False Solution 2: Using Counter…
Apache Bench for Load Testing AB( Apache Bench) is a command line utility to measure performance of any web server. It’s originally designed to test the Apache HTTP server. AB is free open source software and distributed under the terms of the Apache License. It’s good practice to Benchmark performance of the any server before…
Install Elasticsearch 5.0 on RHEL / CentOS This article will cover install Elasticsearch 5.x version on CentOS and RHEL distribution. Also guideline to change to Default Cluster and Index settings in Elasticsearch 5.x. So Let’s start with prerequisites Prerequisites: As per the recommendation Elasticsearch need 1.8.0_73 or later and only Oracle’s Java and the OpenJDK…
