Your first Go application

Programming in GO is quick and fun. You can write a working, compiled application with a few lines of code. Write your first Go application Create a directory of your application, let’s call it my-app Open a terminal window in the my-app directory To create two sub-directories, execute mkdir cmdmkdir pkg Start the Atom text editor […]

Set directory access in Windows

When you use SetAccessRule() to set access rights on a Windows directory, the user who will get the permission has to be a member of the Administrators group. If the user is not a member of the Administrators group PowerShell shows the error message Exception calling “SetAccessRule” with “1” argument(s): “Some or all identity references could not be […]

Install and set up Go

Set up the Go development environment Install Git For Mac see Install Git on Macintosh For Windows see Install Git on Windows Install the Go Programming Language Download the Go distribution from The Go Programming Language page and follow the installation instructions. Test the Go installation Open a new terminal window, so the new PATH settings are imported, […]

Install Git on Macintosh

Navigate to https://git-scm.com/download/mac to download Git for the Macintosh. The page automatically downloads the installer for the operating system you use. This app is not trusted by Apple, so to install it Control-click (right-click) the downloaded file and select Open Click the Open button to confirm the action Configure Git To configure Git see Git configuration.

How to duplicate a Windows server that is attached to the Windows Domain

When a Windows server is attached to a Domain only one instance of it can run at a time. To be able to duplicate the server and start a second instance of it Create an image of the server Remote into the server Make sure there is a local administrator account that you can log […]

Unable to insert the virtual optical disk in an Ubuntu virtual machine

When you try to install a new version of the VirtualBox Guest Addition on an Ubuntu virtual machine you may get the error message Unable to insert the virtual optical disk C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso into the machine Ubuntu 64. Could not mount the media/drive ‘C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso’ (VERR_PDM_MEDIA_LOCKED). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed} […]

Raw-mode is unavailable courtesy of Hyper-V error in VirtualBox

For VirtualBox to be able to start virtual machines, Hyper-V has to be turned off in Windows 10. If you get the error message when you try to launch a virtual machine in VirtualBox Raw-mode is unavailable courtesy of Hyper-V Check the Hyper-V setting Open a command prompt as an administrator, Execute the command: bcdedit […]

Windows application installation error codes

To enable logging of .msi packages open a command prompt as an administrator and execute MY_APPLICATION.msi /l*vx install.log Error Code Explanation 2 ? 1603 Error message from the operating system dll can not register msi installation failed required version of the .NET framework missing 1605 Nothing to uninstall ? 1618 ? 1619 The source directory does […]

Stop multiple untagged AWS EC2 instances with a Bash script

 List all EC2 instances without a specific tag One day we have found 499 instances running in our account without any tags. Most likely someone accidentally started a process to launch those, so we needed a way to find them and stop them. Later we will terminate them with the same script below when we can make […]