The User Profile Service failed the sign-in. User profile cannot be loaded.

When you try to start a remote desktop connection to a Windows computer on the domain you may get the error message:

The User Profile Service failed the sign-in. User profile cannot be loaded.

To enable the User Profile update

  1. Remote into the computer with a local administrator account,
  2. In Windows Explorer open the C:\Users\Default\AppData folder,
  3. Right click the Roaming folder and select Properties,
  4. On the Security tab click the Advanced button,
  5. In the Permission entries list select System,
  6. Check the Replace all child object permissions… check box,
  7. Click the OK button,
  8. Click the Yes button on the Windows Security popup,
  9. Close the Properties window with the OK button.

Add SSH key to a Jenkins Git step

To access a Git repository Jenkins can use an SSH key.

To add the SSH key to the Jenkins server use the following Chef script

Store the SSH key in an encrypted data bag called “keys”.

 "id": "ci_private_keys",
 "ci_github_key": "-----BEGIN RSA PRIVATE KEY-----\n...\n-----END RSA PRIVATE KEY-----",


Add the following to the Jenkins Chef recipe

  • Install Git
package 'git'
  • Install the Git and Credentials Jenkins plugins
jenkins_plugin 'git'
jenkins_plugin 'credentials'
  • Copy the SSH key to the Jenkins server
rsa_key = data_bag_item('keys', 'ci_private_keys')
file '/var/lib/jenkins/.ssh/id_rsa' do
  content "#{rsa_key['ci_github_key']}"
  owner 'jenkins'
  group 'jenkins'
  mode '0600'
  • Add to the known hosts
bash 'provide RSA fingerprint' do
  code <<-EOF
   ssh-keyscan >> /var/lib/jenkins/.ssh/known_hosts
   chown jenkins.jenkins /var/lib/jenkins/.ssh/known_hosts
  not_if{system('grep /var/lib/jenkins/.ssh/known_hosts')}


To specify the SSH key in the Git step

  1. When the Jenkins server is operational, navigate to the Web interface
  2. Create a new Jenkins project
  3. In the Source Code Management section
    1. Select Git
    2. Enter the SSH URL of the repository
    3. When you are adding the first project, click the Add button to create the credential

      1. Click Jenkins to select the credentials provider
      2. Select SSH Username with private key as the Kind
      3. Enter the username you used when you created the SSH key for the Git repository
      4. Select From the Jenkins master ~/.ssh as the Private Key
      5. Click the Add button
    4. In the Credentials drop down select the credential you have created (the Git user name)


Secure passwords in TeamCity

When a TeamCity build step needs to use a password, there is a secure way to store it.

  1. In the TeamCity web interface navigate to the project,
  2. On the project page open the Parameters page,
  3. Click the Add new parameter button,
  4. Enter the name of the parameter, the password value, and click the Edit button to set the special settings,
  5. Set the Display to Hidden, and the Type to Password to hide the value from the user interface. Click the Save button on this window and the on the parent window to save the parameter.
  6. To use the parameter in a build step, surround it with % signs.

Manage Windows Backups

To manage the Microsoft Windows Backups you can use a command line tool.

Open a command prompt as administrator

Show the existing backup versions

Wbadmin get versions

Clean up the backup disk

To keep a number of latest backups and delete the rest

Wbadmin delete backup -keepversions:NUMBER_OF_BACKUPS_TO KEEP

To keep the latest backup only

Wbadmin delete backup -keepversions:1

To delete all existing backups

Wbadmin delete backup -keepversions:0


Chef custom resource is using the same property name as the called resource

When you create a Chef custom resource, you can call other resources including custom resources you have created. For ease of use it can be convenient to use the same property name as the called resource use.

property :delay_mins,          Fixnum, default: 3

reboot 'Hostname was changed' do
 reason reboot_reason
 delay_mins delay_mins
 action :request_reboot

When you you execute the code, chef will display the following error message:

property delay_mins is declared in both reboot[Hostname was changed] and utils_reboot[hostname_reboot] action :request_reboot. Use new_resource.delay_mins instead.

To tell Chef that you want to use the property you have created in this custom resource, add new_resource. in front of your property:

property :delay_mins,          Fixnum, default: 3

reboot 'Hostname was changed' do
 reason reboot_reason
 delay_mins new_resource.delay_mins
 action :request_reboot

Bluetooth Not Available in Sierra on the Mac

This is the second time that after a software update the Bluetooth Not Available message showed in the toolbar, so I could not use my wireless mouse anymore.

There are two recommended actions we can take to bring Bluetooth back to life:

Delete the file from Library / Preferences

  1. Start Finder
  2. In the Go menu select Go to Folder
  3. Enter /Library/Preferences into the text box and click the Go button
  4. Delete the file
  5. Shut down the Macintosh
  6. Start the computer again

Reset the SMC to reinitialize the Bluetooth module

  1. Shut down the Macintosh
  2. Disconnect all peripherals
  3. Make sure the power adapter is connected to the computer
  4. Press and hold the Shift, Control and Option buttons for 10 seconds
  5. Start the computer with the power button

Second monitor does not work on Toshiba P-70A in Windows 10

Since I installed Windows 10 on my Toshiba P-70A laptop, the computer does not recognize the second monitor.

To make the second monitor work, I had to uninstall the display drivers and remove them from the computer:

  1. Open the File Explorer
  2. Right click This PC and select Properties
  3. In the upper left corner select Device Manager
  4. Expand the Display adapters section
  5. Right click each display adapter,
    1. Select Uninstall
    2. Check  Delete the driver software for this device
  6. The computer will reboot.

To keep your second monitor working do not update the display drivers, keep the drivers that Windows installs during the reboot.

How to secure Jenkins

When you install Jenkins, the default settings allow anyone to sign up and administer it. There are many ways to secure Jenkins, the simplest is to disable the user sign up and require login to administer the server.

  1. Click sign up in the upper right corner and create an account for yourself
  2. On the Jenkins Dashboard select Manage Jenkins
  3. On the Manage Jenkins page select Configure Global Security
  4. Make sure the circled items are set according to the picture below.

Minimum Windows workstation setup to work with Windows servers

If you work on a Mac or Linux workstation and need to script and administer Windows servers, you need a few Windows tools. You can create a Windows Virtual Machine hosted in the free Virtual Box from Oracle. For installation instructions see Install the DevOps development tools on Windows

  • Notepad++
  • Chocolatey
  • Git
  • AWS CLI (Amazon Web Services Command Line Interface)