Linux

Redundant Array of Inexpensive Disks

RAID RAID is a technology that is used to increase the performance and/or reliability of data storage. The abbreviation stands for Redundant Array of Inexpensive Disks. A RAID system consists of two or more drives working in parallel. These disks can be hard discs, but there is a trend to also use the technology for SSD (solid state drives). There are different RAID levels, each optimized for a specific situation. These are not standardized by an industry group or standardization committee. ...

How to install /e/OS in Gigaset GS290 from GNU/Linux

I created this post as aim to collaborate with the project and help those how are bought a Gigaset GS290 to test this great /e/ OS degoogle fork, and have been failed by using easy installer, but first I will let clearly that these steps are the steps I followed in order to set up the /e/ OS in my Gigaset. Requirement-system: GNU/Linux OS (in my case Fedora).** ADB & Fastboot library latest.** /e/OS build** boot.img** recovery.img** Basic knowledge in terminal & command line. Sudo Requirement-smartphone: ...

/prometheus/data/chunks_head/ troubleshoot

I will share a little workaround in order to re-establish Prometheus service back in the game. Origin of issue: I’ve had an issue with my local network at home by the ISP provider, I had have shut down my RaspberryPi and other devices. Then when I could solved the issue and all my devices were up and running I checked up my services and I found that Prometheus got stuck by a “mmap: invalid argument” message. ...

Setup monitoring system [Grafana+Prometheus] in RaspberryPi (Part1)

On this post I will explain how I set up a Grafana + Prometheus into a RaspberryPi with Raspbian. Here it’s a little design where explains how it is the implementation I did: 🔵 Server: RaspberryPi 3B+ Services to install(server side): Grafana Prometheus (Metric collector and database) Node Exporter (collector worker) 🟢 Clients: Raspberrypi Zero Fedora Workstation Debian VPS Services to install(client side): Node Exporter (collector worker). 🔵 Lets start from the server side. ...

Format & Mount an usb drive in GNU/Linux [terminal]

Format and Mount usb drive in GNU/Linux Tools/commands: lsblk parted df fdisk mkfs wipefs check if which blcok devices used by usb (sd) [df -h, lsblk] eg: a) $ sudo fdisk -l Disk /dev/sda: 7.2 GiB, 7736072192 bytes, 15109516 sectors Disk model: DataTraveler 3.0 Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: dos Disk identifier: 0x00000000 b) ...

Monitoring with Cockpit

On this post we are going to talk about cockpit how to monitoring and manage your GNU/Linux infrastructure. Based on the official description, Cockpit project is pretty easy to use, install and integrate, you can manage and add servers by ssh credentials to your dashboard, showing logs, monitoring containers(podman/docker), services running, disk usage, etc. I’ve using it around 1 year, the only thing I cannot see it’s an alert tool or event trigger, maybe for the next release; is developed by RH team and open source, it’s already integrated in some of the GNU/Linux distribution ( RH, debian, ubuntu, fedora, etc). ...

Nextcloud bot as Notification System

Following the last post, where I shared how to use Telegram’s bot; on this post I’m going to explain how implement it by Chat Nextcloud API. This post is useful for those have a Nexctcloud deployment running at home/cloud. Assuming you have already Nextcloud up and running, we can create the new user, that we are gonna use it as “BOT” we will need the chat room token and the “BOT” credentials. ...

Telegram Bot as Notification System

From one older post “Create a job using crontab” I used into my script the service exim4/ssmtp as mail server using gmail, but as we’re trying to walk away of Google’s jaw, I switched my notification engine to Telegram by an API service(bot)… almost it’s a step forward ! :) Requirement: Bot (Telegram) Web Browser Terminal(script) I will assume you have already set up your Bot on Telegram with BotFather When you have already created your Bot you can check by the API through a web browser ...

OpenVPN usando Raspberry Pi3 + Noip

Requisitos: RaspberryPi –> https://www.raspberrypi.org/downloads/raspberry-pi-os/ OpenVPN –> https://pivpn.io/ Cuenta abierta –> https://www.noip.com/ Una IP Estatica en tu Raspberry –> Router manual Router con capacidad de tunel VPN —> IPsec, PPTP, L2TP. Public IP —> https://www.whatismyip.net/ Pasos: 1. Crear DNS Record A en Noip Apunta tu IP publica Abre tu sesion con tus credenciales en Noip Dentro del Dashboard ve al apartado “Dynamic DNS > Create Hostname” rellena: hostname, ejemplo: test Domain, ejemplo: ddns.net IPv4 address: Tu IP publica Click en Crear ...

Setup Podman service in Silverblue by Systemd

Into my Devops learning path 👨‍💻 I decided to deploy a monitoring centre into my workstation where I could be able to watch my containers, resources, logs, etc and continue improving my knowledge, in my case I’m using Silverblue developed by Fedora so in here it’s a little bit different the setup; as monitoring tool I choose Cockpit for its great integration and support. Workstation: Silverblue 🖥️ Container engine: Podman ⚙️ Monitoring tool(app/service):Cockpit 📦 I splinted out the instructions in 4 simple parts: ...