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Typing vagrant from the command line will display a list of all available commands.

Be sure that you are in the same directory as the Vagrantfile when running these commands!

Creating a VM

• vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
• vagrant init <boxpath> -- Initialize Vagrant with a specific box. To find a box, go to the public Vagrant box catalog. When you find one you like, just replace it's name with boxpath. For example, vagrant init ubuntu/trusty64.

Starting a VM

• vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)

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PS1 Bash prompt generator 
http://bashrcgenerator.com/

UI color picker
https://uicolorpicker.com/

Crontab Generator
https://crontab-generator.org/

Git Bash color themes

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au! BufNewFile,BufReadPost *.{yaml,yml} set filetype=yaml foldmethod=indent

autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab

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syntax on
filetype plugin indent on

autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab

set is hlsearch ai ic scs
nnoremap <esc><esc> :nohls<cr>

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set ts=2
set sts=2
set sw=2
set expandtab

syntax on
filetype indent plugin on

set ruler

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---
#### Ansible Playbook to perform Kernel Patching on RHEL/CentOS and Ubuntu/Debian Servers ####

- hosts: workers
  become: yes
  become_user: root
  serial: 3


  tasks:

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kind: Pod
apiVersion: v1
metadata:
  name: pod-using-nfs
spec:
  # Add the server as an NFS volume for the pod
  volumes:
    - name: nfs-volume
      nfs:
        # URL for the NFS server

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kind: Service
apiVersion: v1
metadata:
  name: nfs-service
spec:
  selector:
    role: nfs
  ports:
    # Open the ports required by the NFS server
    # Port 2049 for TCP

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---
#### Ansible Playbook to perform old Kernel removal on RHEL/CentOS Server ####
tasks: 
  - name: Ensure the latest yum-utils  package is available on the server
    yum:
      name: yum-utils
      state: latest  
      
  - name: remove the old kernels from the system
      shell: package-cleanup --oldkernels --count=2 -y

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KataContainers
- image coupled with kernel 
- light vm layer
- can run in nested virturalization environments if hardware supports and you can enable it in bios (ex. only bare metal EC2 instances, limits many cloud providers)
- slower startup time
- OCI compliant
- previously known as ClearContainers by Intel

gvisor
- kernel implemented in userspace