L.

Restart the VM: sudo reboot Restart the VM: sudo reboot

Then inside Ubuntu terminal run: sudo apt update sudo apt install build-essential dkms linux-headers-$(uname -r) Mount and install: sudo mkdir -p /media/cdrom sudo mount /dev/cdrom /media/cdrom sudo /media/cdrom/VBoxLinuxAdditions.run

To enable bidirectional copy/paste between your host computer and the Ubuntu VM in VirtualBox: Shut down the VM (recommended). In VirtualBox:Select your VM Go to Settings → General → Advanced Set:Shared Clipboard → Bidirectional Drag’n’Drop → Bidirectional (optional)

If you get this error : VMWGFX Seems to be Running on a Unsupported Hypervisor on VirtualBox. Solution In VirtualBox: Open Settings → Display Change:Graphics Controller → VBoxSVGA Video Memory → 128 MB

DevOps - Installed Ubuntu on a virtual machine and solved a few errors along the way.

Data is simply raw facts or figures. Data without context is useless.

=EDATE(A1,1) - Add months to a date =EOMONTH(A1,0) - Last day of the month =TEXT(A1,"dd-mm-yyyy") - Format date

Excel - TODAY() - Current date =NOW() - Current date and time =DATE(year,month,day) - Create a date =DAY(A1) - Extract day =MONTH(A1) - Extract month =YEAR(A1) - Extract year =DATEDIF(A1,B1,"Y") - Calculate years between dates =NETWORKDAYS(A1,B1) - Working days between dates

MAXIFS() - Returns the max value that matches multiple conditions.

Excel- COUNTIF() - Counts cells matching one condition. COUNTIFS() - Counts cells matching multiple conditions. AVERAGEIF() - Returns average based on one condition. AVERAGEIFS() - Returns average based on multiple conditions.

@worthlesscoder INDEX + MATCH is a power combo 💪

Virtual machines run on a hypervisor. One of the most famous hypervisors is Oracle VM VirtualBox by Oracle Corporation.

Advantages: Easier to install Good for learning and testing

DevOps - Virtualization allows you to run multiple operating systems on the same computer using a virtual machine (VM), instead of using separate physical computers. A virtual machine shares the hardware resources of the main computer (called the host machine), such as: RAM

An operating system also: manages memory and system resources handles process scheduling provides security manages networking controls file systems and devices

Linux is Unix-like, but it was written independently and does not contain the original Unix source code. Linux distributions include Debian, Ubuntu, and others.

Devops - An operating system (OS) is software that allows applications to interact with computer hardware and I/O devices. When you click an application like Chrome, the operating system helps execute it and manages communication between the application and the hardware.