System variables are settings that control how certain commands work.
They can turn on or turn off modes such as Snap, Grid, or Ortho. They can set default scales for hatch patterns. They can store information about the current drawing and about program configuration. Sometimes you use a system variable in order to change a setting. At other times you use a system variable to display the current status.
For example, the GRIDMODE system variable turns the dot grid display on and off when you change the value. In this case, the GRIDMODE system variable is functionally equivalent to the GRID command.DATE is a read-only system variable that stores the current date. You can display this value, but you cannot change it.
regedit
To scan all system files in Windows, you can use the System File Checker (SFC) tool. At the command prompt, enter the command sfc /scannow and press Enter. This command will check for and repair corrupted system files. Make sure to run the command prompt as an administrator for it to work properly.
To view system messages when telnetting, you must enter the terminal monitor command.
You can display prompts on the command line instead of using a dialog box, or switch back again. This option is useful primarily when using scripts.Some functions are available both on the command line and in a dialog box. In many cases, you can enter a hyphen before the command to suppress the dialog box and display prompts on the command line instead. For example, entering layer on the command line displays the Layer Properties Manager. Entering -layer on the command line displays the equivalent command line options. Suppressing the dialog box is useful for compatibility with earlier versions of GstarCAD? and for using script files. There may be slight differences between the options in the dialog box and those available on the command line.
You can enter a command by using the keyboard. Some commands also have abbreviated names called command aliases.To enter a command by using the keyboard, type the full command name on the command line and press ENTER or SPACEBAR.Specify Command OptionsWhen you enter commands on the command line, you see either a set of options or a dialog box. For example, when you enter circle at the command prompt, the following prompt is displayed:Specify center point for circle or [3P/2P/Ttr (tan, tan, radius)]:You can specify the center point either by entering X,Ycoordinate values or by using the pointing device to click a point on the screen.To choose a different option, enter the letters capitalized in one of the options in the brackets. You can enter uppercase or lowercase letters. For example, to choose the three-point option (3P), enter 3p.Execute CommandsTo execute commands, press SPACEBAR or ENTER, or right-click your pointing device after entering command names or responses to prompts. The instructions in Help assume this step and do not specifically instruct you to press ENTER after each entry.Repeat and Cancel CommandsIf you want to repeat a command that you have just used, press ENTER or SPACEBAR, or right-click your pointing device at the command prompt.You also can repeat a command by entering multiple, a space, and the command name, as shown in the following example:Command: multiple circleTo cancel a command in progress, press ESC.
To launch the System Information window on a Windows computer, you can use the command msinfo32. You can enter this command in the Run dialog (accessed by pressing Windows + R) or in the Command Prompt. This will open the System Information tool, where you can view detailed information about your system's hardware and software configuration.
Use "/?" option with command. For example, if you want help for "chkdsk" command, enter "chkdsk /?" and press enter.
system info...msinfo32.exe
Netdiag is a tool used by Windows Administrators and if entered into the environmental variables can be run from the command line as "Netdiag" with its specific switches. Netdiag works by interfacing with specific objects of an operating system these might be COM+ or WIN32 objects to return values such as subnet mask, gateway address' etc... if you are looking to as how it works as a tool you need to open a command prompt (elevated preferably) and enter in the "netdiag" command (ensuring that it has been added to environmental variables) with specific syntax of a task you are trying to achieve.
When the DOS command DATE is executed, it prompts the user to enter a new system date. If the user inputs a valid date, the system updates the current date accordingly. If the user simply presses Enter without entering a new date, the command displays the current date without making any changes. The command is primarily used to view or modify the system date in a DOS environment.
Command prompt is a simple term meaning the place where you can enter system commands. It has different names on different systems, Windows -cmd(Command Prompt), Linux Mac - Terminal
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