Posts by Guoan Xiao (Admin)

Set Up APT Package Repository on Debian Ubuntu

How to Set Up APT Package Repository on Debian/Ubuntu Server

This tutorial is going to show you how to set up your own package repository on Debian/Ubuntu server. If you…

Reasons to Use Softphones in Your Call Center

Reasons to Use Softphones in Your Call Center

Communication greatly improved with the advancement of technology. From pagers and landlines, mobile phones came into popularity. Besides personal use,…

How to Fix Common Let's Encrypt Certbot Errors

How to Fix Common Let’s Encrypt/Certbot Errors

If you are a Linux server administrator, you probably know that Let’s Encrypt is a free, automated, and open certificate…

Is Hedera and the HBAR Network Most Effectively Tied to NFTs

Is Hedera and the HBAR Network Most Effectively Tied to NFTs?

When it comes to cryptocurrency and NFTs, there are a lot of buzzwords and jargon that are thrown around. Sometimes,…

lightmeter web interface

Linux Mail Server Monitoring with Lightmeter (Debian, Ubuntu)

This article will be showing you how to set up Lightmeter, which is an open-source self-hosted mail server monitoring tool,…

How Artificial Intelligence is Disrupting Data Management

How Artificial Intelligence is Disrupting Data Management

Data management and artificial intelligence have always had a symbiotic and reciprocal relationship. When integrated into the former’s tools, the…

How to Set Up WireGuard VPN Relay

How to Set Up WireGuard VPN Relay

This quick tutorial is going to show you how to set up VPN relay between two servers so that when…

Automatic IP and Domain Warm-up For Your Email Server

🔥 Automatic IP and Domain Warm-up For Your Email Server

This tutorial is going to show you how to warm up your email server IP address and domain name automatically,…

is linux secure for apps

Is Linux Secure for Apps?

There is a growing demand for application security tools, and when you factor in the increasing number of threats new…

How to Proactively Identify Bugs In Your Code

How to Proactively Identify Bugs In Your Code

Unfortunately, sometimes it does not matter how hard you try; a bug will appear in your code. This is part…

Setting Up V2Ray Proxy on Ubuntu Server

How to Set Up V2Ray Proxy on Ubuntu 22.04/20.04 Server

This tutorial is going to show you how to set up V2Ray proxy server on Ubuntu 22.04/20.04. V2Ray is a…

openvpn access server admin login

How to Set Up OpenVPN Access Server on Ubuntu 22.04/20.04

This tutorial is going to show you how to run your own OpenVPN Access server on Ubuntu 22.04/20.04. OpenVPN is…

Set Up OpenVPN with Stunnel on Ubuntu

How to Set Up OpenVPN with Stunnel on Ubuntu 22.04/20.04 Server

This tutorial is going to show you how to run your own OpenVPN server on Ubuntu 22.04/20.04. OpenVPN is an…

Set Up BTCPay Server on Ubuntu with Docker

How to Set Up BTCPay Server on Ubuntu 22.04/20.04 with Docker

BTCPay server is an open-source, self-hosted cryptocurrency payment processor. With BTCPay Server, you don’t need to pay fees to a…

Install OSRM on Ubuntu 20.04 - open source routing machine

How to Install OSRM on Ubuntu 22.04 – Open Source Routing Machine

OSRM (Open Source Routing Machine) is a super fast routing engine for OpenStreetMap (OSM) road networks. In previous tutorials, we…

Set Up SoftEther VPN Server on Ubuntu

How to Set Up SoftEther VPN Server on Ubuntu 22.04/20.04

This tutorial is going to show you how to run your own VPN server by installing SoftEther VPN server on…

openconnect vpn server ocserv rocky linux 9 almalinux 9

Set Up OpenConnect VPN Server (ocserv) on Rocky Linux 9/AlmaLinux 9

This tutorial is going to show you how to run your own VPN server by installing OpenConnect VPN server on…

pmm query analytics

MySQL/MariaDB Database Performance Monitoring with Percona on Ubuntu Server

This tutorial is going to show you how to install PMM (Percona Monitoring and Management) on Ubuntu to monitor MySQL/MariaDB…

postfixadmin-virtual-mailbox-domain-centos-rhel

Part 3: PostfixAdmin – Create Virtual Mailboxes on Rocky Linux 9/Alma Linux 9 Mail Server

In previous articles, we discussed how to set up your own mail server on Rocky Linux 9/Alma Linux 9 from…

install dovecot imap server centos rhel

Part 2: Install Dovecot IMAP Server on Rocky Linux 9/Alma Linux 9 & Enable TLS Encryption

This is part 2 of building your own email server from scratch on Rocky Linux 9/Alma Linux 9 tutorial series.…