In this tutorial, I will take you through the concepts of networking in Docker. A Docker container requires a host to run on. This could be either a physical machine (e.g., a bare-metal server in your on-premise datacenter) or a Virtual machine either on-prem or in the cloud. The host has the Docker service and ... Read more
In this article, I will take you through the steps to manage ports in Docker. By default, when you create a container, it does not publish any of its ports to the outside world. To make a port available to services outside of Docker, or to Docker containers which are not connected to the container’s ... Read more
In this tutorial, we will go through top 12 Nmap commands to scan remote hosts. Nmap is a free and open-source network scanner created by Gordon Lyon. Nmap is used to discover hosts and services on a computer network by sending packets and analyzing the responses. Nmap provides a number of features for probing computer ... Read more
In this tutorial, we will go through Elasticsearch Backup and Restore procedure. Elasticsearch is an open source search engine based on Lucene, developed in Java. It provides a distributed and multitenant full-text search engine with an HTTP Dashboard web-interface (Kibana). The data is queried, accessed and stored in a JSON document format. Elasticsearch is a ... Read more
In this tutorial, I will go through the function in bash shell scripting with examples. Bash function is basically a set of commands that can be called number of times. The very purpose of a function is to help reuse the same logic multiple times. Compared to other programming languages, Bash functions are little different ... Read more
In this article, I will take you through 10 Best ElasticSearch API Query. Elasticsearch is a search engine based on the Lucene library. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents. Elasticsearch is developed in Java. Here we will see different types of Elasticsearch api query ... Read more
In this tutorial, I will take you through the steps to install lspci, lsscsi, lsusb, and lsblk tools in RedHat/CentOS 7. In few of the instances we wanted to know the hardware configuration of our Servers. We have some open source tool available which can be used to check those configurations. For e.g: to check ... Read more
In this tutorial, I am going to take you through the concepts of Loops in C++. It is a general-purpose programming language created by Bjarne Stroustrup as an extension of the C programming language, or "C with Classes". In the Programming World, loops are frequently used to run a block of code multiple times to ... Read more
In this tutorial, I will take you through the different ways to change date and time in Linux (RedHat/CentOS 7). Sometimes it is very important to have correct date and time in your Linux Server. Change Date and Time in Linux timedatectl is the command to change date and time in RedHat/CentOS7. We will go ... Read more
In this tutorial, I will take you through the steps to enable ssh on Ubuntu(18.04/17.04/16.04). OpenSSH is a freely available version of the Secure Shell (SSH) protocol family of tools for remotely controlling, or transferring files between, computers. Traditional tools used to accomplish these functions, such as telnet or rcp, are insecure and transmit the ... Read more