Brandon Catubig bcatubig

A systemd service for regenerate SSH host keys as oneshot

sudo nano /etc/systemd/system/regenerate-ssh-host-keys.service
sudo chown root:root /etc/systemd/system/regenerate-ssh-host-keys.service
sudo systemd daemon-reload
sudo systemctl enable regenerate-ssh-host-keys.service

Note: Do not start the service since the ExecStartPost will disable the service itself once started.

Ubuntu 18.04 installation with LUKS and LVM

Installation Process

Pre-installation from live OS

This setup of Ubuntu with LUKS and LVM is tested on Ubuntu 18.04.

Boot Ubuntu from a Live OS and select the option to try Ubuntu without installing. Follow the steps I've outlined below. Let's assume you're installing to /dev/nvme0n1.

Partition the drive with your tool of choice: I used gparted to set mine up.

Resources

KUBERNETES CLUSTER

local https://github.com/kubernetes-sigs/kind (or just use minikube if it works for you)
cloud https://cloud.google.com/kubernetes-engine (for PersistentVolume and Ingress, I needed to try the real deal)
practice environment: https://github.com/arush-sal/cka-practice-environment

PRACTICE

Install Proxmox and a RancherOS VM with Portainer to manage docker containers

WARNING MAY BE INCORRECT AND INCOMPLETE, USE AT YOUR OWN RISK

I have tried this setup and although it works and may be good for ceratin circumstances I would advise using ubuntu as the base with docker, docker-compose, and portainer. https://gist.github.com/mow4cash/626275e095f7f90898944a85d66b3be6

Link to my docker run file https://gist.github.com/mow4cash/6a25343cdeb0cd115f263dea0a3b623d

This guide has moved to a GitHub repository to enable collaboration and community input via pull-requests.

https://github.com/alexellis/k8s-on-raspbian

Alex

Create bootable USB

dd bs=4M if=/path/to/archlinux.iso of=/dev/sdx status=progress oflag=sync

Boot from USB and set prepare system

loadkeys <your-keymap>

Safest way to clean up boot partition - Ubuntu 14.04LTS-x64, Ubuntu 16.04LTS-x64

Reference

Case I: if /boot is not 100% full and apt is working

1. Check the current kernel version

$ uname -r

Numbers

Text

Reverse a String – Enter a string and the program will reverse it and print it out.
Pig Latin – Pig Latin is a game of alterations played on the English language game. To create the Pig Latin form of an English word the initial consonant sound is transposed to the end of the word and an ay is affixed (Ex.: "banana" would yield anana-bay). Read Wikipedia for more information on rules.
Count Vowels – Enter a string and the program counts the number of vowels in the text. For added complexity have it report a sum of each vowel found.
Check if Palindrome – Checks if the string entered by the user is a palindrome. That is that it reads the same forwards as backwards like “racecar”
Count Words in a String – Counts the number of individual words in a string. For added complexity read these strings in from a text file and generate a summary.

	# Install these packages (use your favorite AUR tool here)
	yay -S minikube kubectl docker-machine-driver-kvm2 libvirt qemu-headless ebtables

	# Get libvirt going
	sudo systemctl enable libvirtd.service
	sudo usermod -a -G libvirt $(whoami)

	# This fix thanks to http://blog.programmableproduction.com/2018/03/08/Archlinux-Setup-Minikube-using-KVM/
	sudo virsh net-autostart default

	// define the bitbucket project + repos we want to build
	def bitbucket_project = 'awesome'
	def bitbucket_repos = ['foo','bar','baz']

	// create a pipeline job for each of the repos and for each feature branch.
	for (bitbucket_repo in bitbucket_repos)
	{
	multibranchPipelineJob("${bitbucket_repo}-ci") {
	// configure the branch / PR sources
	branchSources {