dmi3mis

apiVersion: v1
kind: Pod

metadata:
  name: pod
  labels:
    app: podapp

spec:
  containers:

dmi3mis

This is the manual process for enrolling a host running SUSE/SLE 12 SP2 with FreeIPA.

The following reference documentation was used to create this process:

• An outdated guide on Enrolling a SUSE machine with FreeIPA
• The  Manual FreeIPA guide from the RedHat documentation.

I do not recommend using yast to set this up, however it is useful to check if the configuration is valid. SUSE/SLE has all the required packages to use FreeIPA but does not have the conveinent ipa-client tools, such as ipa-client-install.

Pre-Requisites

dmi3mis

#!/bin/bash

sshpass -p redhat ssh -o StrictHostKeyChecking=no root@workstation 'wget -c https://mirror.openshift.com/pub/openshift-v4/x86_64/clients/ocp/latest/openshift-client-linux.tar.gz'
sshpass -p redhat ssh -o StrictHostKeyChecking=no root@workstation 'tar -xvf openshift-client-linux.tar.gz --overwrite -C /usr/local/bin/'

dmi3mis

#!/bin/bash
# this sample script is ping computers in loop. 
# It uses conditional expression with color echo

for HOST in $(seq $1 $2)
do 
  echo -en "\nlets try ping $HOST: "
  if ping -c 1 -W 1 f${HOST} >/dev/null 2>&1
   then
    echo -e "\e[1;32m alive \e[0m" 

dmi3mis

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

dmi3mis

Setup Windows Subsystem 2 for Linux

Windows Subsystem 2 for Linux, Hyper, ZSH + Oh My Zsh + Powerlevel9k + plugins, FNM + VSCode (+ext) and Nerd Font

To setup native Linux, see this gist

Requirements

dmi3mis

[kiosk@foundation0 ~]$  ssh root@utility
[root@utility ~]# cd /etc/pki/CA/
[root@utility ~]# openssl genrsa -out /etc/pki/CA/private/registry.lab.example.com.key 2048
Generating RSA private key, 2048 bit long modulus (2 primes)
......................................+++++
......................................................+++++
e is 65537 (0x010001)
[root@utility ~]# openssl req -new -subj "/C=US/ST=North Carolina/L=Raleigh/O=Red Hat/CN=registry.lab.example.com" -key /etc/pki/CA/private/registry.lab.example.com.key -out /etc/pki/CA/csr/registry.lab.example.com.csr
[root@utility ~]# openssl x509 -req -in /etc/pki/CA/csr/registry.lab.example.com.csr -CA /etc/pki/CA/cacert.pem -CAkey /etc/pki/CA/private/cakey.pem -CAcreateserial -out /etc/pki/CA/certs/registry.lab.example.com.crt --days 3650 -sha256

dmi3mis

HISTCONTROL=ignoredups
HISTIGNORE=?:??
shopt -s histappend
shopt -s cmdhist
shopt -s lithist
export PROMPT_COMMAND="${PROMPT_COMMAND:+${PROMPT_COMMAND}$"\n"}history -a; history -r"

dmi3mis

syntax on
filetype plugin indent on

"Get the 2-space YAML as the default when hit carriage return after the colon
autocmd FileType yaml setlocal ts=2 sts=2 sw=2 expandtab



if &diff
 " change vimdiff color scheme https://stackoverflow.com/questions/2019281/load-different-colorscheme-when-using-vimdiff

dmi3mis

for host in master node1 node2 services workstation; do
  echo "Changing date on ${host} ..."
  case ${host} in
    services)
    sshpass -p redhat ssh -o StrictHostKeyChecking=no root@${host} 'systemctl stop mariadb'
      ;;
   esac
   sshpass -p redhat ssh -o StrictHostKeyChecking=no root@${host} 'systemctl disable --now chronyd && timedatectl set-time "2020-07-05 `date +%T`" && reboot'
done