junftnt

# INSIDE WSL, install gdb (one-time instruction)
sudo apt install gdb

# Add the following to your kernel Makefile CFLAGS, so that gcc will generate 
# debug symbols that the debugger can use
# Note: The thing being added is -g, so as of lesson 12 it should look like this.  
# Delete all the contents of the lib folder to force a recompile
CFLAGS = -ffreestanding -fshort-wchar -g

# Add the following to your qemu invocation and start QEmu:

junftnt

# A tiny 16-bit guest "kernel" that infinitely prints an incremented number to the debug port

#
# Build it:
#
# as -32 guest.S -o guest.o
#	ld -m elf_i386 --oformat binary -N -e _start -Ttext 0x10000 -o guest guest.o
#

.globl _start

junftnt

Using QEMU KVM

• Installation
• Qemu Overview
• The Qemu VM Instance
  • Details on the qemu-kvm options used
• Qemu Resources
  • Qemu Binaries Explained
• Logging into a QEMU VM

junftnt

#!/bin/bash
set -x
fsid="$1"
cephadm rm-cluster --fsid $fsid --force
source /etc/os-release
sudo systemctl stop tripleo_\*
sudo systemctl stop ceph\*
sudo pcs cluster destroy
if [ $VERSION_ID == "7" ]; then
  sudo docker ps -a -q | xargs docker rm -f

junftnt

package main

import (
        "bytes"
        "io"
        "log"
        "os"
        "os/exec"
)

junftnt

Problem

You have installed GPG, then tried to commit and suddenly you see this error message after it:

error: gpg failed to sign the data
fatal: failed to write commit object

Debug

junftnt

// Source: https://ixday.github.io/post/golang-cancel-copy/

import (
	"io"
	"context"
)

// here is some syntaxic sugar inspired by the Tomas Senart's video,
// it allows me to inline the Reader interface
type readerFunc func(p []byte) (n int, err error)

junftnt

package main

import (
	"context"
	"fmt"
	"log"
	"net/http"
	"time"
)

junftnt

package main
import (
        "net/http"
        "net/http/httputil"
        "net/url"
      	"time"
      	"net"
        "log"
        "fmt"
        "crypto/tls"

junftnt

#!/usr/bin/python
""" Glance client to convert QCOW2 images in Glance to RAW """

# from pprint import pprint
from os import environ as env
import collections
import subprocess
# import sys

from glanceclient.v2 import client as glclient