Reytech reytech-dev

## kernel-panic-boot.md

      
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                reytech-dev
                / kernel-panic-boot.md
            
            
              Created
              July 21, 2021 09:18
            
              
                Centos7 - No filesystem could mount root
              
          
    Centos7 - Kernel Panic on boot: No filesystem could mount root

This issue is mostly caused through a failed kernel update.
So far I experienced it only if the yum update transaction got interrupted.
How to fix

(tested with CentOS 7 and a Digital Ocean droplet)

Boot Droplet with "Recovery ISO" (https://cloud.digitalocean.com/droplets/YOUR-ACCOUNT-ID/recovery?i=YOUR-DROPLET-ID)


## kdeconnect-app-compilation.md

      
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                / kdeconnect-app-compilation.md
            
            
              Last active
              June 1, 2021 12:31
            
              
                Prepare environment and compile kdeconnect-app with QT 5.15.0
              
          
    Prepare local build environment and compile kdeconnect-app

The following instructions where tested with ubuntu 20.04.
The following module builds of kdeconnect-app will fail with the given instructions (so far, will update the gist asap I found out whats missing):
Requirements


QT 5.15.0
extra-cmake-modules 3.16.3
kdesrc-build
gcc


## nginx_proxy_pass.md

      
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                reytech-dev
                / nginx_proxy_pass.md
            
            
              Created
              May 28, 2021 10:13
            
              
                Nginx location, proxy_pass path/subdir missing
              
          
    NGINX location with proxy_pass

Example configuration
location /example {
  set $exampleVariable "examplePath";
  proxy_pass http://localhost:8080/$exampleVariable;
}


## create-cloud-template.sh
#!/bin/bash
set -o errexit

clear
printf "\n*** This script will download a cloud image and create a Proxmox VM template from it. ***\n\n"

### HOW TO USE
### Pre-req:
### - run on a Proxmox 6 server
### - a dhcp server should be active on vmbr1

## howto.md

      
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                reytech-dev
                / howto.md
            
            
              Created
              January 21, 2021 21:22
            
              
                Auto-mount LUKS partition
              
          
    Mount an encrypted partition on boot
Hint: Always replace "< .... >" with the actual value

Find out which name the partition has

$ lsblk

Receive UUID of device


## Fix.md

      
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                reytech-dev
                / Fix.md
            
            
              Last active
              March 20, 2024 10:19
            
              
                ZONE_CONFLICT: 'docker0' already bound to a zone
              
          
Check if docker zone exists in firewall-cmd

$ firewall-cmd --get-active-zones

If "docker" zone is available, change interface to docker0 (not persisted)

$ sudo firewall-cmd --zone=docker --change-interface=docker0

If "docker" zone is available, change interface to docker0 (persisted, thanks rbjorklin)


## Docker networking
Source: https://stackoverflow.com/questions/40214617/docker-no-route-to-host

# Firewalld settings
1. open all IPs starts with "172" so that all the containers may communicate each other
```shell
$ sudo firewall-cmd --permanent --zone=public --add-rich-rule='rule family=ipv4 source address=172.0.0.0/8 accept'
```

2. make our container able to visit the network outside
```shell

## error-vmlinux-x-x.md

      
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                reytech-dev
                / error-vmlinux-x-x.md
            
            
              Created
              August 22, 2020 18:23
            
              
                Steps to fix 'error file /boot/vmlinuz-x.x not found'
              
          
    Steps to fix "error file '/boot/vmlinux-x.x-x86_64' not found (Manjaro)

Great help: https://forum.manjaro.org/t/boot-error-vmlinuz-5-6/2896/3

https://forum.manjaro.org/t/boot-error-vmlinuz-5-6/2896/2


Create Live Stick with Manjaro


Download: https://manjaro.org/downloads/official/gnome/
Create bootstick: https://manjaro.org/support/firststeps/#making-a-live-system


Change UEFI Settings on your broken system: Boot > Secure Boot > Other OS (You can also disable UEFI, but make sure to re-enable it after you are done here!!)
Boot broken system with the live-system


## SPACE API DigitalOcean Request
<?php
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// This script is made and tested for GET requests, please change the required params for other types of requests //
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

// e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 - sha256 of empty input
date_default_timezone_set("UTC");
// Region where the space is hosted (amsterdam)
$region = "ams3";
// Host of the space without protocol

## OAuth Twitter
<?php
/**
 * Generates a 42 chars random string (No need to change it)
 */
$oauth_nonce = preg_replace("/[^A-Za-z0-9 ]/", "", base64_encode(random_bytes(32)));
/**
 * Get current unix timestamp (careful what is set as Locale in your PHP environment - No need to change it)
 */
$oauth_timestamp = time();
/**
	#!/bin/bash
	set -o errexit

	clear
	printf "\n* This script will download a cloud image and create a Proxmox VM template from it. *\n\n"

	### HOW TO USE
	### Pre-req:
	### - run on a Proxmox 6 server
	### - a dhcp server should be active on vmbr1
	Source: https://stackoverflow.com/questions/40214617/docker-no-route-to-host

	# Firewalld settings
	1. open all IPs starts with "172" so that all the containers may communicate each other
	```shell
	$ sudo firewall-cmd --permanent --zone=public --add-rich-rule='rule family=ipv4 source address=172.0.0.0/8 accept'
	```

	2. make our container able to visit the network outside
	```shell
	<?php
	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
	// This script is made and tested for GET requests, please change the required params for other types of requests //
	////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

	// e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 - sha256 of empty input
	date_default_timezone_set("UTC");
	// Region where the space is hosted (amsterdam)
	$region = "ams3";
	// Host of the space without protocol
	<?php
	/**
	* Generates a 42 chars random string (No need to change it)
	*/
	$oauth_nonce = preg_replace("/[^A-Za-z0-9 ]/", "", base64_encode(random_bytes(32)));
	/**
	* Get current unix timestamp (careful what is set as Locale in your PHP environment - No need to change it)
	*/
	$oauth_timestamp = time();
	/**