Security
Disabling Root SSH Login and Creating a Sudo User: Linux Server Security
One of the most important aspects of running a Linux server is ensuring that it is secure. This means protecting…
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..
Apache
What is Apache Prefork, Worker and Event MPM (Multi-Processing Modules)
Apache is the most popular web server for Linux web servers. Most of the Linux system administrator’s start with Apache…
Tomcat
How to Increase Tomcat Upload File Size Limit
Today while deploying a war file (development site code) in Tomcat 8, I faced the following issue regarding upload limit…
PostgreSQL
PostgreSQL: Backup and Restore Database
In the world of database management, ensuring the safety and integrity of your data is paramount. PostgreSQL, with its robust…
Linux Security
Resolved ‘bash: scp: command not found’ Issue in Linux
If you’ve spent any significant amount of time working in a Linux environment, you’re likely familiar with the SCP (Secure…
PostgreSQL
How to Check Postgres Database & Table Size
This guide is designed to assist you in finding out the size of databases and tables on your PostgreSQL server,…
PostgreSQL
How to List Databases and Tables in PostgreSQL
PostgreSQL is a powerful open-source relational database management system, known for its robustness and extensibility. As a database administrator or…
Sendmail
How to Install Sendmail Server on CentOS/RHEL 7/6
Sendmail is a MTA (Mail Transfer Agent) server used for transferring email from between different hosts. Sendmail uses SMTP (Simple…
Opensource
Building a Multi-Node Elasticsearch Cluster on Ubuntu
In the ever-expanding world of big data, Elasticsearch has emerged as a front-runner in the search and analytics engine space.…
Monitoring Tools
How To Install Nagios Server In CentOS/RHEL 9/8
Nagios is an open-source monitoring software that allows system administrators to monitor the health and performance of servers, applications, and…