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it does not work!

how to rename all of files with the name "aaaa" in Hard drive "D" to "ssss"?

thanks to all

i just want to copy these certain files. not any more. some other files with the same name "a" my be exist

i want to copy two files for example c:\a.jpg and c:\a.txt to d:\

how to do it by 1 line command?
(not using "for" command)

how to minimize my batch file window when it starts, using a command

I have firefox and opera but my default web browser is opera. when i try this:

it does not use firefox to open this page and opera would do that

i have a variable named "r". we dont know what nomber is in it. i set another, named "t" set /a t=%r% i need to set some variables. for example if t=30 i would need 30 new variables. how to set and access them? i use it: set p%t%=eee but dont know how can i access and change them...

yes. that is true
i mean output
thank u so much

and sorry for my english

how to save export of a command into a variable?

how to find out location of a file witch is running and I can see it in processes?

there is a command shows all processes. what is it? i have forgotten

i dont have any idea. in fact, this is not my question. somebody else asked this. can anyone help?

i want to rename a folder. the batch file must replace X with a random number(from 1 to 100). and when i run it again , the name change with another number

folderX ----> folder22 ----> folder68

thank u. worked

is not exists any way to change position of the same batch file witch is already running?