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Is about a script programming language used in Windows.


Command Content
cd X Move to folder X
REM or :: Comments / Remarks
echo Write to console
@echo off Don't write script content to console
a & b Do a and b commands in parallel
a && b Do a and b commands in serial
echo^ test After ^, one can continue the command in a new line but add a space!


  • Environment variables
    • set message=Hello World to set a variable
      • Caution, things like " shouldn't be used and are significant
      • But maybe you need to have it when you use the variable, like directories path
    • echo %message% to view a variable
  • Local variables:
REM to define variables to be local:
REM to add something to PATH
set PATH=%PATH%;c:\whatever\else
Environment Variables Content
%COMPUTERNAME% Computer name
%~dp0 Current directory of the .bat launched


if var1 == var (
    echo do something
) else (
    echo do else

Files & Folder

  • Folder
    • Create mkdir
  • Files & folder
    • Rename REN or rename
    • Use a drag-n-dropped file in a batch: "%~1"
    • Shortcut to start a command line in the current directory: create a bat file containing @cmd
  • Variables stored into a file
    • Save echo %var%>filename
    • Load set /p var=<filename
  • Test if something exists
    • File if exist filename (...)
    • Folder if exist folder\ (...)


There's several ways to launch an app: * start * start NAME.exe * start "" "NAME WITH SPACE.exe" - the 1st "" is for window title * call * Great when calling other .cmd, otherwise the execution flow is transferred (source) * Otherwise will break other commands, like pause

Somewhat related: if you want to pass a command in a LNK shortcut to the command line, use cmd.exe /k yourcommand

Check that a process is running

tasklist /fi "ImageName eq MyApp.exe" /fo csv 2>NUL | find /I "myapp.exe">NUL
if "%ERRORLEVEL%"=="0" echo Program is running
if "%ERRORLEVEL%"=="1" echo Program isn't running