Alexander humboldt

Doing upgrade of Centos 7 server to Centos 8. Step to step guide.

1. Migrating backup of working system to virtual guest or another server.

Preparation of test image. Boot from Centos 7 CD into troubleshoot mode and skip to shell. Prepare disks of guest machine. Make partitions and filesystems.

Sda2 - boot - ext2

Docker basic

Version
Docker client version 20.10.12
Docker server version 20.10.12

link

docker version

Wordpress & Docker

This file will setup Wordpress, MySQL & PHPMyAdmin with a single command. Add the code below to a file called "docker-compose.yaml" and run the command

$ docker-compose up -d

# To Tear Down
$ docker-compose down --volumes

Installing KVM, libvirt, Docker-CE and Kubernetes on Centos 7.x

First of all be root while doing this... sudo su

Set hostname

Set the hostname:

hostnamectl set-hostname 'k8s-master'

Raspberry Pi 3 IoT Home Server

Presentation

http://tinkerman.cat/rpi3_iot_server.pdf (Catalan)

Get the latest image and flash the SD card

download the latest image

Install `cockpit-docker` for Docker CE on CentOS

sudo yum install epel-release
sudo yum -y install dnf dnf-plugins-core
dnf download cockpit-docker
sudo rpm -Uvh --nodeps cockpit-docker-138-6.el7.centos.x86_64.rpm
sudo service cockpit restart

This flow (and associated circuits/hardware) is designed to allow Node-RED to pass messages via radio waves in the same way as it passes messages via MQTT, using commonly-available, inexpensive handheld radios and the Raspberry Pi. The flow has been tested using Baofeng, Wouxun, and Quansheng handheld ham radios. In short, the goal is to allow packet-like transmissions between Node-RED systems over miles, while keeping the hardware costs down (or free for those hams who have surplus Baofengs hanging around). This could be used for a backup to MQTT when the Wifi is unreliable, or simply as a long-distance and network-agnostic message channel.

Prerequisites: Software

First, we need PulseAudio to make and receive sounds with our USB soundcard:

sudo apt-get install pulseaudio -y

	Eliminar todos los contenedores detenidos

	docker system prune

	Eliminar todas las imágenes

	docker rmi $(docker images -a -q)

	Listar los volumenes

	https://docs.docker.com/compose/reference/overview/

	docker-compose build # build containers (usefull if changed)
	docker-compose up # builds, (re)creates, starts, and attaches to containers for a service.
	docker-compose up -d # same in detached mode
	docker-compose up --force-recreate # stop all containers and recreate
	docker-compose up --build # rebuild custom images
	docker-compose stop # stop but dont remove
	docker-compose start # restart
	docker-compose down # stop & remove containers

	==========================================================================
	DO NOT WRITE ANY QUESTIONS IN COMMENTS
	==========================================================================
	This is not appropriate place for discussions. Keep this list FW-only.
	I do NOT have any firmware files apart from published here or on 4pda. Please do not contact me for firmware files requests.


	This is a list of files found on Huawei update server by brute-forcing URL parameters.
	Some firmware files have changelogs. Just change file name to "changelog.xml" in the end of the URL.