Jeff Pettorino 0xSheepdog

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fixing your broken shit

i fix broken shit. builder and fixer, systems and infra. linuxwright. my highest accolade is Cory Doctorow thanking me for my service as a sysadmin.

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0xSheepdog / virt-customize-example.sh

Last active January 14, 2024 03:20

howto customize libvirt guest disk image before deployment

	# This script provides examples for using the 'virt-customize' command to modify
	# a libvirt guest disk image. It demonstrates a few common items as well as
	# runs a shell script with more in-depth commands that will be run on the
	# appliance and saved to the disk image. See my 'customize-guest.sh' gist for
	# an example of the type of script you may use.
	# gist.github.com/0xSheepdog/07284a9b1a1a3e2d30cc63a40a89cb77

	$ virt-customize \
	-a rocky-9.0-x86_64.qcow2 \
	--root-password password:S3CRETPA$SW0RD \

0xSheepdog / customize-guest.sh

Last active November 25, 2023 20:56

this shell script is intended for use with the `virt-customize` command via the `--run` parameter. it sets certain configurations on a libvirt guest disk image

	# add myuser and grant sudo privileges
	useradd -m myuser
	echo password \| passwd myuser --stdin
	echo "myuser ALL=(ALL) ALL" \| tee -a /etc/sudoers.d/00-myuser

	# enable serial console
	systemctl enable --now [email protected]

	#

0xSheepdog / enable-serial-console.sh

Created November 16, 2023 18:51

Enable a serial port console on Enterprise Linux 8+

sudo systemctl enable --now [email protected]

0xSheepdog / linked-clone.sh

Last active March 6, 2025 21:20 — forked from aojea/linked-clone.sh

Script to create a linked clone with libvirt

	#!/bin/bash

	set -xe
	# This script takes as a parameter the name of the VM
	# and creates a linked clone
	# Ref: https://unix.stackexchange.com/a/33584
	# The scripts assumes that it runs from the same folder
	# where the vm image is located and it coincides with the
	# image name

0xSheepdog / ansible.cfg

Last active January 20, 2021 00:15

A simple, quick ansible.cfg example file. AND a not quite so simple YAML formatted inventory/hosts file. Examples for multiple group membership, host and group variables ... please review the official doco.

	[defaults]
	inventory = ./inventory.yml
	vault_password_file = .vaultpass
	retry_files_enabled = false
	roles_path = ./roles
	gathering = smart
	callback_whitelist = timer, profile_tasks

	[privilege_escalation]
	become = true

0xSheepdog / howto_virt-install_KVM-guest

Last active November 6, 2022 23:26

howto create a new KVM guest at the CLI with virt-install

	source: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/virtualization_deployment_and_administration_guide/sect-guest_virtual_machine_installation_overview-creating_guests_with_virt_install

	The following example installs a virtual machine from an ISO image:
	# virt-install \
	--name guest1-rhel7 \
	--memory 2048 \
	--vcpus 2 \
	--disk size=8 \
	--network default \
	--cdrom /path/to/rhel7.iso \

0xSheepdog / howto-access-qcow2-image

Last active October 26, 2023 17:09

How to change root passwd/gain access to an official .qcow2 image from Red Hat et al.

	source info: https://access.redhat.com/solutions/641193#comment-1104651

	virt-customize -a rhel-guest-image-7.2-20160302.0.x86_64.qcow2 --root-password password:PASSW0RD --uninstall cloud-init

0xSheepdog / virt-spartify.nfo

Created May 1, 2020 03:07

virt-sparsify --tmp=. --compress drive.qcow2 new-drive.qcow2

0xSheepdog / powerline_setup.sh

Created May 24, 2019 19:54 — forked from cheuerde/powerline_setup.sh

Powerline on Debian and Centos for BASH, VIM and TMUX

	# Claas Heuer, November 2015
	#
	# Setup Powerline on Debian and Centos for BASH, VIM and TMUX
	# source: https://fedoramagazine.org/add-power-terminal-powerline/


	# install on debian
	sudo apt-get install python-pip
	sudo apt-get install powerline

0xSheepdog / cidr-cheat-sheet

Created January 17, 2019 22:24

CIDR SUBNET MASK CHEATSHEET & ICMP TYPE CODES

	CIDR SUBNET MASK CHEATSHEET & ICMP TYPE CODES
	https://oav.net/mirrors/cidr.html
	_____________________________________________________________________________

	Netmask Netmask (binary) CIDR Notes
	_____________________________________________________________________________
	255.255.255.255 11111111.11111111.11111111.11111111 /32 Host (single addr)
	255.255.255.254 11111111.11111111.11111111.11111110 /31 Unuseable
	255.255.255.252 11111111.11111111.11111111.11111100 /30 2 useable
	255.255.255.248 11111111.11111111.11111111.11111000 /29 6 useable

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