Fixing local and remote computer problems.
Checking to make sure no virus/ malware/ spy ware are on the computer and if there are, stopping and deleting them.
Destroying computers that do not belong to you.
Shutting down websites and servers that do not belong to you.
In addition to these there is almost an infinite number of things that you cant do because they are Illegal in some way shape or form.
In conclusion it may be illegal to use command prompt depending on what you are doing with it.
If you remember one thing from this article remember that, yes it is legal to use, but you cant damage property that you do not own.
EDIT:
No, its not illegal. Its just a software tool, like Microsoft Word etc. Keep in mind that Command Prompt is a shell of MS-DOS which was a OS made by Microsoft (same guys which make Windows), and so it can't be illegal to use. They do put in there for a reason.
But, like with any software, you could get prosecuted if you use the software for the harm of another person. Same goes for learning a programming language.
when using command prompt, after you give it a command, press the enter button. Command prompt will then carry out the task and will automatically go to the next line.
To print "Hello, World!" using the Command Prompt in Windows, you can use the echo command. Open the Command Prompt and type: echo Hello, World! Then press Enter, and it will display "Hello, World!" in the command line interface.
Its not possible from DOS Prompt..
You can do it by using "chkdsk" command.
You can start registry editor using command prompt by using "regedit" command. You can also use registry tools such as "regedit /restore" or "regedit /fix" etc.
Run program.exeorthe name of the program, with or without .exe (if the command prompt is in the same directory/folder of the executable)
Just run "regedit" command from DOS..
compact
use the netstat command.
To reconnect your media using the Command Prompt, you can use the net use command to map a network drive. First, open Command Prompt as an administrator. Then, type net use X: \\servername\sharename (replacing "X:" with your desired drive letter and "servername\sharename" with the appropriate network path) and press Enter. If necessary, include your username and password with the command using /user:username password.
The command prompt is a terminal window, and allows the user to control their computer using specific commands. Command line recovery tools include ddrescue and the ntfs* family of tools.
Yes, you can turn off Driver Verifier using the Command Prompt. To do this, open the Command Prompt as an administrator and type the command verifier /reset, then press Enter. This command disables Driver Verifier and resets its settings. You may need to restart your computer for the changes to take effect.