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@shamil
shamil / mount_qcow2.md
Last active July 14, 2025 21:00
How to mount a qcow2 disk image

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
@simlegate
simlegate / custom-error-page
Created October 31, 2014 05:35
Nginx return custom json
error_page 400 404 405 =200 @40*_json;
location @40*_json {
default_type application/json;
return 200 '{"code":"1", "message": "Not Found"}';
}
error_page 500 502 503 504 =200 @50*_json;
location @50*_json {
@allixsenos
allixsenos / explain.py
Last active June 2, 2019 10:08
Django QuerySet Explain
from django.db import connections
from django.db.models.query import QuerySet
from __future__ import print_function
class QuerySetExplainMixin:
def explain(self, analyze=True):
cursor = connections[self.db].cursor()
print(self.query)
print()
sql, params = self.query.sql_with_params()
#!/bin/bash
#
# Script to setup a Elastic Beanstalk AMI with geospatial libraries and postGIS
#
# sh aws_ami_prep.sh > aws_ami_prep.log 2>&1 &
# Go to ec2-user home directory
cd /home/ec2-user
# yum libraries
@chrismdp
chrismdp / s3.sh
Last active January 23, 2025 09:26
Uploading to S3 in 18 lines of Shell (used to upload builds for http://soltrader.net)
# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
# This is how I upload my new Sol Trader builds (http://soltrader.net)
# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash
S3KEY="my aws key"
S3SECRET="my aws secret" # pass these in
function putS3
{
path=$1
@leommoore
leommoore / mongodb_3.2.x_replica_sets_on_aws_ec2.md
Last active March 15, 2022 22:28
MongoDB 3.2.x Replica Sets on AWS EC2

#MongoDB 3.2.x Replica Sets on AWS EC2 A MongoDB replica set provides a mechanism to allow for a reliable database services. The basic replica set consists of three servers, a primary, a secondary and an arbitrator. The primary and secondary both hold a copy of the data. The arbitrator is normally a low spec server which just monitors the other servers and help with the failover process. In production, there can be more than three servers.

To setup mongo as a replica set on Amazon Web Services EC2 you need to first setup a security group with ssh on port 22 and mongodb on port 27017. You then need to create three servers. Select Ubuntu 14.04 LTS x64 and a micro (or bigger depending on your database size, ideally you should have enough memory to match your database size) instance for the primary and secondary and a nano instance for the arbitrator.

##Adjust the File System on each Server The operating system by default will update the last access time on a file. In a high data throughput database application

@shvechikov
shvechikov / signed_s3_upload.py
Created April 28, 2016 13:10
Upload files to S3 using generated signed URLs
import requests
from boto.s3.connection import S3Connection
c = S3Connection(AWS_ACCESS_KEY, AWS_SECRET_KET)
data = 'file content'
filename = 'dir/name.txt'
bucket_name = 'your-bucket-name'
headers = {'Content-Type': 'text/plain'}
@vladborovtsov
vladborovtsov / s3.sh
Created July 17, 2016 11:30 — forked from chrismdp/s3.sh
Uploading to S3 in 18 lines of Shell (used to upload builds for http://soltrader.net)
# You don't need Fog in Ruby or some other library to upload to S3 -- shell works perfectly fine
# This is how I upload my new Sol Trader builds (http://soltrader.net)
# Based on a modified script from here: http://tmont.com/blargh/2014/1/uploading-to-s3-in-bash
S3KEY="my aws key"
S3SECRET="my aws secret" # pass these in
function putS3
{
path=$1
@aunyks
aunyks / large-file-hash.py
Last active December 7, 2024 16:34
Hash a large file in Python
import hashlib as hash
# Specify how many bytes of the file you want to open at a time
BLOCKSIZE = 65536
sha = hash.sha256()
with open('kali.iso', 'rb') as kali_file:
file_buffer = kali_file.read(BLOCKSIZE)
while len(file_buffer) > 0:
sha.update(file_buffer)
@agentsim
agentsim / highsierra_bootable.sh
Created June 10, 2017 02:23
Create bootable ISO from HighSierra Installer
# Generate a BaseSystem.dmg with 10.13 Install Packages
hdiutil attach /Applications/Install\ macOS\ 10.13\ Beta.app/Contents/SharedSupport/InstallESD.dmg -noverify -mountpoint /Volumes/highsierra
hdiutil create -o /tmp/HighSierraBase.cdr -size 7316m -layout SPUD -fs HFS+J
hdiutil attach /tmp/HighSierraBase.cdr.dmg -noverify -mountpoint /Volumes/install_build
asr restore -source /Applications/Install\ macOS\ 10.13\ Beta.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
cp -R /Volumes/highsierra/Packages /Volumes/OS\ X\ Base\ System/System/Installation
hdiutil detach /Volumes/OS\ X\ Base\ System/
hdiutil detach /Volumes/highsierra/
mv /tmp/HighSierraBase.cdr.dmg /tmp/BaseSystem.dmg