Linux Server

Apache Jmeter test and report information

How to Use Apache JMeter to Load Test Web Applications

Apache JMeter is an open-source load testing tool, available for Linux, macOS, and Windows. In a previous tutorial, we explained…

Linux Server Performance Monitoring with Netdata

Linux Server Performance Monitoring with Netdata

Netdata is an open-source real-time Linux server performance monitoring tool with a beautiful web front-end. It allows you to monitor…

how to fix common Nginx errors

How to Fix Common Nginx Web Server Errors

Nginx is a very popular web server these days. This article will show you some common errors when running an…

port knocking

Use Port Knocking To Secure SSH Service (Debian/Ubuntu)

In this tutorial, I’m going to show you how to use port knocking to secure SSH service on Debian and…

application security

10 Steps in Application Security Assessment

If you are a web-based company or even a company that uses the internet for any purpose, application security assessment…

WireGuard Mesh VPN Encryption for MariaDB Galera Cluster

WireGuard Mesh VPN Encryption for MariaDB Galera Cluster

This tutorial is going to show you how to build a WireGuard mesh VPN and use it to encrypt replication…

Set Up Authoritative DNS Servers with Webmin

How to Set Up Authoritative DNS Servers with Webmin

In previous tutorials, we explained how to set up authoritative DNS servers and edit DNS records from the command line.…

How to Create a Linux VPS Server on ScalaHosting

How to Create a Linux VPS Server on ScalaHosting

ScalaHosting is my recommended VPS (Virtual Private Server) provider for running email servers. This article is going to explain how…

Secure Email Server Against Hacking

How to Secure Email Server Against Hacking with VPN (Debian/Ubuntu)

In this tutorial, I’m going to share with you my tips and tricks to secure email servers against hacking with…

Set Up ModSecurity with Nginx on Debian Ubuntu

How to Set Up ModSecurity with Nginx on Debian/Ubuntu

This tutorial is going to show you how to install and use ModSecurity with Nginx on Debian/Ubuntu servers. ModSecurity is…

Set Up ModSecurity with Apache on Debian Ubuntu

How to Set Up ModSecurity with Apache on Debian/Ubuntu

This tutorial is going to show you how to install and use ModSecurity with Apache on Debian/Ubuntu servers. ModSecurity is…

dovecot postfixadmin quota

How to Configure User Quota in Dovecot & PostfixAdmin

This tutorial is going to show you how to configure user quota in Dovecot and PostfixAdmin. Prerequisites To follow this…

ocserv-apache-nginx-haproxy

Run OpenConnect VPN Server & Apache/Nginx on the Same Box with HAProxy

This tutorial will be showing you how to run OpenConnect VPN server (ocserv) and Apache/Nginx on the same box with…

Install Proxmox Virtual Environment

How to Install Proxmox Virtual Environment on a Dedicated Server

This tutorial is going to show you how to install Proxmox VE on a dedicated server. Proxmox VE (Virtual Environment)…

Set Up SMTP and IMAP Proxy with HAProxy

Set Up SMTP & IMAP Proxy with HAProxy (Debian, Ubuntu, CentOS)

In previous tutorials, we discussed how to set up a mail server from scratch on Linux (Ubuntu version, CentOS/RHEL version),…

Enable and Configure Postscreen in Postfix to Block Spambots

Enable and Configure Postscreen in Postfix to Block Spambots

In previous tutorials, we discussed how to set up a mail server from scratch on Linux (Ubuntu version, CentOS/RHEL version).…

Use Postfix Transport Map and Relay Map For Flexible Email Delivery

Use Postfix Transport Map & Relayhost Map For Flexible Email Delivery

In previous tutorials, we discussed how to quickly set up a full-featured mail server using iRedMail or Modoboa, and we…

Run Apache, Nginx & HAProxy on Same Server (Debian, Ubuntu, CentOS)

Run Apache, Nginx & HAProxy on Same Server (Debian, Ubuntu, CentOS)

If you’re a server admin, you probably have a web server of your choice like Apache, or Nginx. Apache is…

nextcloud onlyoffice same machine

How to Easily Integrate OnlyOffice and NextCloud Using Docker

Previously I’ve written about integrating OnlyOffice and NextCloud the traditional way, which is a long process. Now you can easily…

tls certificate

Why You Should Use WebRoot Plugin to Obtain Let’s Encrypt TLS Certificate

For those who don’t know Let’s Encrypt, it’s a free, automated (to some extent) and open certificate authority that issues…