joseluisq

How to resize a qcow2 disk image on Linux

This example takes olddisk.qcow2 and resizes it into newdisk.qcow2, extending one of the guest's partitions to fill the extra space.

1. qcow2 format

1.1. Verify the filesystems of olddisk.qcow2

fkraeutli

How to retrieve GIT LFS files from GitHub

Retrieving non-LFS files

Through the GitHub API it is possible to retrieve individual files from a Git repository via, e.g. curl. To do so, first retrieve the content information for the relevant file (or folder):

curl https://api.github.com/repos/{organisation}/{repository}/contents/{file or folder path}

For private repositories, authenticate using your username and a personal access token

Th3Whit3Wolf

What's Cool

• Encrypted root partition
  • AES-256 bit cipher
  • Argon2id variant for PBKDF
  • Sha3-512 bit hash
• rEFInd bootloader
  • With dreary theme
  • Optimal Settings (optimized for aesthetics, and boot time)
• Boot into backups thanks to refind-btrfs

MaxXor

Encrypted Btrfs storage setup and maintenance guide

Initial setup with LUKS/dm-crypt

This exemplary initial setup uses two devices /dev/sdb and /dev/sdc but can be applied to any amount of devices by following the steps with additional devices.

Create keyfile:

dd bs=64 count=1 if=/dev/urandom of=/etc/cryptkey iflag=fullblock
chmod 600 /etc/cryptkey

Fingercomp

This is the translation of my blog posts. You can find them here (in Russian).

Table of contents

1. How to generate basic sounds
2. Sound waves, modulation
   1. Sound waves
   2. Modulation
3. Additive synthesis, PCM
4. Sinusoid

xahare

Docker on Qubes

Since this page is apparently the top result on google, Heres a link to how to do it.

https://martingladdish.co.uk/technology/setting-up-docker-under-qubesos/

That page has more detail, but here are the instructions in case its down.

1. Install docker engine, following the instruction on https://www.docker.com. NOT DESKTOP as that wont work in Qubes (unless you enable nested virtualization)

Imater

Рекомендованные знания для React разработчика high middle

React

• Варианты создания компонента (pureFunction, class, createElement)
• pureRender - знания принципа ререндера Реакт приложений при изменениях хранилищ, какие props приводят к неоправданному перерендеру, кеширование результатов функций
• Контейнер - его назначение, основные задачи, типовая структура
• Глупый компонент - его назначение, основные задачи, принцип разбиения на компоненты, функции
• React router - как создавать синхронный, асинхронный роутер, как отложить рендер компонента в Route на время загрузки, как работает функция match, как считывать параметры url ?q=1, #q=1 как их устанавливать при .
• Последовательность DOM render, последовательность вызова всех функций компонента, например componentDidMount, componentWillMount, componentWillReceiveProps и всех остальных. Как использовать ref, в какой момент он вызывается.

ygotthilf

ssh-keygen -t rsa -b 4096 -m PEM -f jwtRS256.key
# Don't add passphrase
openssl rsa -in jwtRS256.key -pubout -outform PEM -out jwtRS256.key.pub
cat jwtRS256.key
cat jwtRS256.key.pub

alister

# Create the container - we run 'echo' in the container, and reuse the same as we will be running later
docker run -d -v /data --name redis.data dockerfile/redis echo Data-only container for Redis
# the data container doesn't show up  - nothing is running
docker ps      
# will show 'redis.data', but as stopped
docker ps -a   

# start redis, attach to 'redis.data'
docker run -d -p 6379:6379 --volumes-from redis.data --name ca.redis.1 dockerfile/redis

shamil

How to mount a qcow2 disk image

This is a quick guide to mounting a qcow2 disk images on your host server. This is useful to reset passwords, edit files, or recover something without the virtual machine running.

Step 1 - Enable NBD on the Host

modprobe nbd max_part=8