polprog

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

polprog

#include <stdio.h>

/********************
 * Enterprise array handler
 * (c) 2018 Polprog
 * 
 ********************/

//TODO: Rewrite in C++ as a class
void * getArrayElement(void * arr, char element, char elementSize){

polprog

This was created as a helper script for backing up my directory with VMs

It's not the prettiest one, but it's very simple and flexible. Works for me!

Be careful with the remove-old option, you may want to back up some of the older back ups to another place,
since it removers EVERY BACKUP OLDER than a week.

You definitely want the backup root to be a separate partition or, even better, separate disk.

It can be put into cron, if you do so I'd suggest a wrapper script like this:

polprog

#!/bin/bash

##################################
# Small SSH tunnel helper script
# polprog 2017
# http://polprog.net
##################################


SOCKET="vnctun"

polprog

#!/bin/bash
#Analyze fail2ban logs and make a top 10 list of abusers!


if [[ $1 == "today" ]]; then
    echo "Top abusers today:"
    grep "Ban " /var/log/fail2ban.log | grep `date +%Y-%m-%d` | awk '{print $NF}' | sort | awk '{print $1,"("$1")"}' | logresolve | uniq -c | sort -n
else

echo "Top abusers:"

polprog

#Do not run this !!!

#IO operations
alias less='cat'
alias sed='awk'

#administration
alias apt-get='aptitude'

#file editing