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DJI has announced two flagship drones: the Mavic 3 and the Mavic 3 Cine. Both drones can shoot in 4K at up to 120fps and take photos at 20MP. In addition to the main 24mm lens, there is also a...

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dji-mini-3-drone

DJI Mini 3 (DJI Mini 2s) possible Release Date, Price & Specs Rumours

We expect the DJI Mini 3 to be released very soon, as competition in the up to 250g sector increases and models surpassing the Mini 2 appear on the...
pzem-016-rs485-usb

Connect PZEM-016 Energy Meter (ModBus) to Home Assistant – part 2 (directly via RS485...

In the first part, we described how to connect PZEM-016 ModBus energy monitor using RS485 to TTL converter and Wemos D1 mini board using ESPHome add-on. You can read...
pzem-016-rs485-ttl-esp8266-d1-mini

Connect PZEM-016 Energy Meter (ModBus) to Home Assistant – part 1 (via RS485 to...

There are several ways to connect PZEM-016 energy meter (RS485 ModBus output). I will cover each of them. The first way to connect - using RS485 to TTL converter, Wemos...

DokuWiki on a USB Stick in 2021

If you want to run DokuWiki from a portable device like an USB stick on any Windows computer without installing anything on the computer itself - this guide is...

How to backup and restore MySQL and MariaDB databases

MySQL and MariaDB are the most popular database systems that use the SQL language. It's important to take a quick backup before making some changes in your existing data....
docker-cheat-sheet

Docker Cheat Sheet

I love Docker, containers, orchestration and distributed systems and here is my cheat sheet: Installation Linux curl -sSL https://get.docker.com/ | sh Mac Use this link to download the dmg. https://download.docker.com/mac/stable/Docker.dmg Windows Use the msi installer: https://download.docker.com/win/stable/InstallDocker.msi Docker Registries &...
debian-10-sudo

How to Install Sudo and Create a Debian 10 Sudo User

Depending on how you installed Debian 10 Buster, sudo may not have been installed by default. This is normal, actually. So first you have to install it and for...
proxmox-qemu-guest-agent

Resolving No Qemu Guest Agent error in Proxmox VE

The qemu-guest-agent is a helper daemon, which is installed in the guest. It is used to exchange information between the host and guest, and to execute command in the...
linux-mount-usb-drive

How to Mount an External USB Drive in Debian 10 Linux

If the option to automatically mount USB devices has been disabled, or if the device has been unmounted, you can manually mount it by using terminal: Type fdisk -l...

NEWS: WhatsApp Vulnerability Used to Secretly Infect Phones With Spyware from a single missed...

“A buffer overflow vulnerability in WhatsApp VoIP stack allowed remote code execution via specially crafted series of SRTCP packets sent to a target phone number,” said Facebook in an advisory on...

CentOS 7 Installation on Microsoft Hyper-V 2019 Server

Good reasons to choose CentOS for your Hyper-V based Linux server: CentOS is based on RHEL. This is not something that someone is assembling in their garage (not that...

Temperature monitoring with Zabbix and Raspberry Pi via SNMP using DS18B20 sensors

To monitor the temperature I have made a system based on a Raspberry Pi combined with the classic Maxim DS18B20 temperature sensors. My Raspberry Pi is running Raspbian Lite...

Raspberry Pi ADS-B Receiver Project (dump1090-mutability with FlightRadar24, FlightAware, Virtual Radar, Planefinder and ADS-B...

The ADS-B Receiver Project is a set of bash scripts and files which can be used to setup an ADS-B receiver on a Debian derived operating system. The scripts...
raspberrypicli

Useful Raspberry Pi CLI Commands

Sometimes it’s hard to keep track of all the Raspberry Pi commands you use, so I created a list of some of the most useful and important ones that...

Sending emails from CentOS to external email address with authorization on GMail or another...

Setup postfix mail server to use external SMTP with authorization In order to be aware of everything what happens on the server (in addition to monitoring) it is useful to...

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