Docker
How to Install and Use Docker on Ubuntu and Debian
Docker is an open-source platform that enables developers to create, deploy, and manage applications in a lightweight, secure, and efficient…
Author: Rahul
I, Rahul Kumar am the founder and chief editor of TecAdmin.net. I am a Red Hat Certified Engineer (RHCE) and working as an IT professional since 2009..
Debian
A Step-by-Step Guide to Installing OpenDKIM with Postfix on Ubuntu – Unleash the Power of DKIM!
DKIM or DomainKeys Identified Mail is an authentication protocol used to validate the identity of a sender. It’s an important…
General Articles
How to Copy Files from Host to Docker Container
Docker is a platform used to develop, ship, and run applications inside containers. One of the common tasks when working…
Docker
How to Stop and Delete All Docker Containers Efficiently
Docker has become a popular tool for containerization, simplifying the deployment and management of applications across various environments. However, as…
BIG-DATA
Creating Directory In HDFS And Copy Files (Hadoop)
HDFS is the Hadoop Distributed File System. It’s a distributed storage system for large data sets which supports fault tolerance,…
General Articles
What is a Zombie Process in Unix/Linux
A Zombie Process is a process that has completed execution but its parent process has not yet terminated it and…
General Articles
How to Install Apache Hadoop on Ubuntu 22.04
Understanding unstructured data and analyzing massive amounts of data is a different ball game today. And so, businesses have resorted…
Fedora
Upgrading Fedora: Step-by-Step Guide
If you’re new to Fedora, you might not know that there are different versions of it. The latest version of…
MacOS
How To Install PostgreSQL on MacOS
PostgreSQL is an open-source database management system (DBMS) that is widely used for its reliability, performance, and scalability. It is…
Bash Shell
Check if a Variable Contains a Number in Bash
A number is a combination of 0-9 digits—the Bash variables stores all value in the form of strings. Even if…