What does CMD opt PR do?
When you reset the PRAM or NVRAM, your computer restores the default settings for your hardware and sets the internal hard drive as the startup disk. Performing a reset requires you to shut down your computer. While booting, hold down the “Command-Option-P-R” keys immediately after you turn on your computer.
How do I reset my PRAM?
How to Reset PRAM or NVRAM
- Power off your Mac.
- Press your Mac’s power button and then hold these four keys at the same time: ⌘ + option + P + R.
- Continue holding the keys until your Mac restarts for the second time. On older Macs, the chime will sound upon restart.
How do I start macOS utilities on startup?
How to start Mac in Recovery Mode
- Click on Apple logo at the top left of the screen.
- Select Restart.
- Immediately hold down the Command and R keys until you see an Apple logo or spinning globe.
- Eventually your Mac will show the Recovery Mode Utilities window with the following options:
What is command option?
A. The key combination in the Mac that enables a user to terminate an unresponsive application. When all three keys are pressed at the same time, the Force Quit utility is launched, which displays all open applications.
How do you know if your Mac is in safe mode?
To check if you are in Safe Mode follow these steps:
- Click on the Apple logo in the menu (top left).
- Click in About This Mac.
- Click on System Report.
- Click on Software and check what the Boot Mode is listed as – it will say Safe if you are in Safe Mode, otherwise it will say Normal.
What happens after Nvram reset?
NVRAM stores peripheral data such as volume, display resolution and brightness, startup-disk selection, and time settings. Resetting the NVRAM is a quick, easy, way to troubleshoot a misbehaving Mac—it doesn’t delete any data from your storage drive, and it doesn’t require any tools or repair experience.
How do I open the command prompt in Windows 10?
The latter is opened under Windows 7, 8, and 10 with the key combination Win + R. Then all you have to do is type “cmd” into the search field and press the OK button. The command prompt has long had a fixed spot in the Windows start menu as well. Under Windows 7 and Windows 10, the program is found in the “System Tools” folder.
What is command prompt in Windows and how to use it?
Command Prompt in Windows is used to enter command line instructions. The Microsoft operating system provides several options to launch Command Prompt. The method you choose ultimately depends on your personal user habits. You can also open Command Prompt in a special mode with administrator privileges if required for certain system tasks.
What is the default command line interpreter for Windows?
The default command line interpreter for Windows is called CMD.EXE. In addition, however, there’s also the “PowerShell”: This offers more options than CMD.EXE. For example, automations can be created better with PowerShell.
What does -p mean in mkdir command?
Note that -p is an argument to the mkdir command specifically, not the whole of Unix. Every command can have whatever arguments it needs. In this case it means “parents”, meaning mkdir will create a directory and any parents that don’t already exist.