MatthewJDavis

# boot time, kernel and user space
systemd-analyze
# time critcal chain of units
systemd-analyze critical-chain
# prints list of all units ordered by time they took to initialise.
systemd-analyze blame

#Fix - removed faulty network from kvm virtual machine. Went from 5 min in user space (network.service) to 11 seconds. /etc/network/interfaces

MatthewJDavis

#pfx to pem - extract private key and public cert

openssl pkcs12 -in file.pfx -nocerts -out privatekey.pem -nodes

openssl pkcs12 -in file.pfx -nokeys -out publiccert.pem -nodes

# view cert information 

openssl x509 -in publiccert.pem -text

MatthewJDavis

# move existing git tag to different commit.
git log --pretty=oneline
git tag -a v1.0.0 12345j -f
git push origin --tags -f

MatthewJDavis

# change location of log files
[Environment]::SetEnvironmentVariable("TEAMCITY_LOGS_PATH", "D:\logs", "Machine")

# set memory of jvm for teamcity to use
[Environment]::SetEnvironmentVariable("TEAMCITY_SERVER_MEM_OPTS", "-Xmx10g", "Machine")

# Set data directory location
[Environment]::SetEnvironmentVariable("TEAMCITY_DATA_PATH", "D:\DataDir\", "Machine")

MatthewJDavis

# https://realpython.com/python-virtual-environments-a-primer/

sudo pip3 install virtualenvwrapper

vim ~/.bashrc

# Python virtual env wrapper settings
export WORKON_HOME=$HOME/Documents/python/venvs
export VIRTUALENVWRAPPER_PYTHON=/usr/bin/python3
source /usr/local/bin/virtualenvwrapper.sh

MatthewJDavis

# https://wiki.centos.org/TipsAndTricks/NTFS
# http://manpages.ubuntu.com/manpages/xenial/man8/ntfsfix.8.html 
# https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ebs-using-volumes.html
# sudo required


sudo yum install epel-release -y

# install packages to mount and also fix ntfs drives if needed.
sudo yum install ntfs-3g -y 

MatthewJDavis

<#
.SYNOPSIS
    Invite guest users to Azure Active Directory for demo application.
.DESCRIPTION
    Users to be provided in CSV file with the headings 'username,email'.
    Users will be be checked to see if they have been invited to Azure AD as a guest user previously. If there is already an invite, then no action will be take, if a user doesn't exist in Azure AD, then an invite will be sent.
    Output will be logged to the job output in Azure.
.NOTES
    https://docs.microsoft.com/en-us/azure/active-directory/b2b/b2b-quickstart-invite-powershell
#>

MatthewJDavis

{
  "variables": {
    "client_id": "{{env `ARM_CLIENT_ID`}}",
    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}",
    "tenant_id": "{{env `ARM_TENANT_ID`}}",
    "gallery_resource_group": "{{env `GALLERY_RESOURCE_GROUP`}}",
    "managed_image_resource_group": "{{env `MANAGED_IMAGE_RESOURCE_GROUP`}}",
    "managed_image_name": "{{env `MANAGED_IMAGE_NAME`}}",
    "gallery_name": "{{env `GALLERY_NAME`}}",

MatthewJDavis

{
  "variables": {
    "client_id": "{{env `ARM_CLIENT_ID`}}",
    "client_secret": "{{env `ARM_CLIENT_SECRET`}}",
    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}",
    "tenant_id": "{{env `ARM_TENANT_ID`}}",
    "managed_image_name": "{{env `MANAGED_IMAGE_NAME`}}",
    "resource_group_name": "{{env `RESOURCE_GROUP_NAME`}}"
  },
  "builders": [

MatthewJDavis

{
  "variables": {
    "subscription_id": "{{env `ARM_SUBSCRIPTION_ID`}}",
    "managed_image_name": "{{env `MANAGED_IMAGE_NAME`}}",
    "resource_group_name": "{{env `RESOURCE_GROUP_NAME`}}"
  },
  "builders": [
    {
      "type": "azure-arm",
      "subscription_id": "{{user `subscription_id`}}",