silviuvulcan

My oneliners

Useful oneliners, no particular categories or order

Powershell allow local scripts

Set-ExecutionPolicy RemoteSigned -Scope CurrentUser

silviuvulcan

Mount a host folder inside a VM using 9p virtio

/etc/initramfs-tools/modules

# List of modules that you want to include in your initramfs.
# They will be loaded at boot time in the order below.
#
# Syntax:  module_name [args ...]
#

silviuvulcan

If like me you bought a Datto Xeon-D Gigabyte motherboard here are some infos about them.

You can update at least the ipmi with stock gigabyte firmware

Also mine came with a BIOS password, I found this snippet online and indeed this was it:

By the way, if anyone bought one and needs the BIOS password, from my experience there's a 99.9% chance of it being either "R@str" or "Northern" or "NorthernLight$" (no quotes, caps as shown)

silviuvulcan

#!/usr/bin/env bash

# rmate
# Copyright (C) 2011-2018 by Harald Lapp <harald@octris.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#

silviuvulcan

#!/bin/bash
# unaquired feed
UNAQRSS='http://www.myepisodes.com/rss.php?feed=unacquired&showignored=0&uid=YOURUID&pwdmd5=YOURPWD'

if [ "$1" = "unwatched" ]; then
    # unwatched feed
    UNWARSS='http://www.myepisodes.com/rss.php?feed=unwatched&showignored=0&uid=icebox1701&pwdmd5=dcd899992143485371326b141e2db38e'
    UNW=$(curl -s $UNWARSS | grep '<title>\[' | sed -e 's/<[^>]\+>//g' -e 's/^[ \t]*//' -e 's/\]\[/-/g' -e 's/\[\ //g' -e 's/\ \]//g' -e 's/$/<br>/')
    UNWNO=$(echo "$UNW"| sed '/^\s*$/d'|wc -l)
    if [ $((UNWNO)) -gt 0 ]; then

silviuvulcan

$darkString = @'
document.addEventListener('DOMContentLoaded', function() {
    $.ajax({
    url: 'https://cdn.jsdelivr.net/gh/laCour/slack-night-mode/css/raw/black.css',
    success: function(css) {
    let overrides = `
    code { background-color: #535353; color: #85c5ff; } /* Change color: to whatever font color you want */
    .c-mrkdwn__pre, .c-mrkdwn__quote { background: #535353 !important; background-color: #535353 !important; }
    .p-threads_footer__input .p-message_input_field { background: #000 }
    `

silviuvulcan

Sysadmin by doing

This is what I tell people to do, who ask me "how do I learn to be a Linux sysadmin?"

1. Set up a KVM hypervisor.
2. Inside of that KVM hypervisor, install a Spacewalk server. Use CentOS 6 as the distro for all work below. (For bonus points, set up errata importation on the CentOS channels, so you can properly see security update advisory information.)
3. Create a VM to provide named and dhcpd service to your entire environment. Set up the dhcp daemon to use the Spacewalk server as the pxeboot machine (thus allowing you to use Cobbler to do unattended OS installs). Make sure that every forward zone you create has a reverse zone associated with it. Use something like "internal.virtnet" (but not ".local") as your internal DNS zone.
4. Use that Spacewalk server to automatically (without touching it) install a new pair of OS instances, with which you will then create a Master/Master pair of LDAP servers. Make sure they register with the Spacewalk server. Do not allow anonymous bind, do not u

silviuvulcan

How to compile and install latest realtek network driver in pfSense 2.4.x (FreeBSD 11.1)

1. Download FreeBSD 11.1 VMDK and create a VM with it as HDD.

2. Get FreeBSD source tree for your exact FreeBSD version and uncompress it to /usr/src:

   fetch -o /tmp ftp://ftp.freebsd.org/pub/`uname -s`/releases/`uname -m`/`uname -r | cut -d'-' -f1,2`/src.txz
   tar -C / -xvf /tmp/src.txz
   

3. Download latest Realtek network driver.

silviuvulcan

#!/bin/bash

APP_TOKEN=""
USER_KEY=""

function usage {
    echo "Usage: pu.sh --title "Title" --message "Cool message" [ --file catmeme.jpg ]"
    echo
    echo "Options:"
    echo "-h, --help"

silviuvulcan

Multiplatform (amd64 and arm) Kubernetes cluster setup

The official guide for setting up Kubernetes using kubeadm works well for clusters of one architecture. But, the main problem that crops up is the kube-proxy image defaults to the architecture of the master node (where kubeadm was run in the first place).

This causes issues when arm nodes join the cluster, as they will try to execute the amd64 version of kube-proxy, and will fail.

It turns out that the pod running kube-proxy is configured using a DaemonSet. With a small edit to the configuration, it's possible to create multiple DaemonSets—one for each architecture.

Steps

Follow the instructions at https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/ for setting up the master node. I've been using Weave Net as the network plugin; it see