VirtualBox installation and configuration on Macintosh

Download VirtualBox from and follow the instructions to install it. At the time of writing, this was the section where the installer files were referenced Run the downloaded installer file and accept all default values. The installer starts the application.   Create a virtual machine To create a new virtual machine Download the OS image from the […]

Splunk installation

Install Splunk Navigate to the Splunk website at, In the upper right corner select the Free Splunk button, If you don’t yet have a Splunk account, register to create one, otherwise log in, Select the Free Download in the Splunk Enterprise frame, Select the tab with the operating system of your machine. Linux The simplest […]

Send CTRL-ALT-DELETE to a Windows Virtual Box computer from a Macintosh

When you start a Windows 7 or equivalent server machine, to log in, you need to press CTRL-ALT-DELETE on the keyboard to get the login page. To send Control-Alt-Delete to a Windows virtual machine in Virtual Box from a Macintosh on a Macintosh laptop press the fn – Command  – Delete back  keys on a Macintosh desktop […]

Native resolution in Remote Desktop client on MacOSX

When you connect to a Windows computer from your Macintosh workstation the best remote desktop client is the Microsoft Remote Desktop app from the Apple Appstore. To configure the remote desktop connection for the best experience Select Native resolution Scale content for Full screen mode To be able to unselect the “Use all monitors checkbox”, […]

How to move a window on the Macintosh if the header is not visible

There are times when a window opens on your Mac and the header is out of the screen or hiding behind the Macintosh Toolbar. To show the toolbar Option 1. Click the window to select it, Press Command 1 to switch the window to full-screen mode, Press Command 1 again to exit full-screen mode, The toolbar […]

Custom Git Status and Git Pull commands to work with all of your repositories

If you work with many Git repositories it is easy to miss a repository when you commit your changes, and very time consuming to pull from all repositories. It is easy to automate both processes. In this example, we will place all files in the ~/Git/devops-scripts folder. If you want to place your files at another […]

How to verify or generate file checksums

You can verify the checksum of a file with the built-in features of the operating systems On Macintosh and Linux Open the terminal window and execute the commands SHA-256 shasum -a 256 FILE_NAME On Windows CRC32, CRC64, SHA256, SHA1, BLAKE2sp Right-click the file in Windows Explorer and select CRC SHA > * (star) The popup window will […]

Bluetooth: Not Available in Sierra on the Macintosh

After software update in Sierra on my Macintosh, my Bluetooth mouse usually stops working. The toolbar displays the Bluetooth not available icon:  When I click it, the “Bluetooth: Not Available” message is displayed. There are two recommended actions we can take to bring Bluetooth back to life. If the first one does not help, try to execute […]