Kyle Lacy kylewlacy

Here's a Systemd service that will automatically disable the "No valid subscription" nagware dialog in Proxmox VE. I got the snippet to disable the dialog from this article from John's Computer Services.

Save the systemd service to /etc/systemd/system/proxmox-patcher.service
Save the shell script to /root/proxmox-patcher.sh
Run chmod +x /root/proxmox-patcher.sh as root
Run systemctl enable proxmox-patcher.service as root
Restart

Attaching a directory from a host to a libvirtd guest VM

NOTE: These instructions aren't comprehensive! This just covers the main roadblocks every time I need to re-do this process...

(For context, I'm using a Debian 10 host and a Debian 10 guest)

1. Create the directory and update the permissions so `libvirtd-qemu` has access:

host $ mkdir vmshared

Keybase proof

I hereby claim:

I am kylewlacy on github.
I am kylewlacy (https://keybase.io/kylewlacy) on keybase.
I have a public key ASDjZ5rjzY281WRUgbzoHHVpqkAfc3IjfxWzuNtSbLv-FQo

To claim this, I am signing this object:

Recently, I had an issue where I had no loopback device in Linux Mint 18.2 MATE, which occurred after upgrading from 18.1 MATE.

Diagnosis

ping localhost fails, nc -v -l -p 1234 followed by nc localhost 1234 does not connect, etc. Running ifconfig does not show a loopback device present.

Running sudo service network-manager restart and sudo service networking restart doesn't fix the issue, nor does restarting.

The only clue shows up when inspecting /var/log/syslog:

	# Prepend to a variable
	export PATH=/foo${PATH:+:$PATH} # Set path to "/foo:$PATH", or "/foo" if $PATH is empty

	# Append to a variable
	export PATH=${PATH:+$PATH:}/foo # Set path to "$PATH:/foo", or "/foo" if $PATH is empty

	# Tested with nixos-minimal-18.03pre130932.cc4677c36ee-x86_64-linux.iso
	# Manually mounted /mnt (NixOS root), /mnt/boot (mkfs.ext4 Grub partition), /mnt/boot/efi (mkfs.vfat for EFI boot vars)

	[root@nixos:~]# cat /mnt/etc/nixos/hardware-configuration.nix
	# Do not modify this file! It was generated by ‘nixos-generate-config’
	# and may be overwritten by future invocations. Please make changes
	# to /etc/nixos/configuration.nix instead.
	{ config, lib, pkgs, ... }:

	{

	## USAGE
	# $ nix-build kexec-installer.nix
	# can be deployed remote like this
	# $ rsync -aL -e ssh result/ root@host:
	# $ ssh root@host ./kexec-installer
	## Customize it like this
	# # custom-installer.nix
	# import ./kexec-installer.nix {
	# extraConfig = {pkgs, ... } {
	# user.extraUsers.root.openssh.authorizedKeys.keys = [ "<your-key>" ];

	<?xml version="1.0" encoding="UTF-8"?>
	<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
	<!--
	Author: Santiago Saavedra <[email protected]>, Kyle Lacy
	License: CC0
	Year: 2016-2017

	Install:
	Copy to $XDG_CONFIG_DIR/fontconfig/conf.d/57-add-emoji-support.conf
	Run fc-cache -f

	// Copyright 2014 The Gfx-rs Developers.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,

	# bash:
	# # <(some_command) returns a file (technically a named pipe) for the result of some_command
	# $ echo <(echo "hi")
	# /dev/fd63
	# $ cat <(echo "hi")
	# hi
	#
	# fish:
	# # (some_command \| psub) returns a file for the result of some_command
	# $ echo (echo "hi" \| psub)

Kyle Lacy kylewlacy

Attaching a directory from a host to a libvirtd guest VM

1. Create the directory and update the permissions so libvirtd-qemu has access:

Keybase proof

Diagnosis

1. Create the directory and update the permissions so `libvirtd-qemu` has access: