Batch Scripts are stored in simple text files containing lines with commands that get executed in sequence, one after the other. Scripting is a way by which one can alleviate this necessity by automating these command sequences in order to make ones life at the shell easier and more productive.

A batch file consists of a series of commands to be executed by the command-line interpreter, stored in a plain text file. A batch file may contain any command the interpreter accepts interactively and use constructs that enable conditional branching and looping within the batch file, such as IF, FOR, and GOTO labels. The term “batch” is from batch processing, meaning “non-interactive execution”, though a batch file may not process a batch of multiple data.

Convert a file to lower case.

@echo off
if {%1}=={} @echo Syntax: LwrCase FullyQualifiedFileName&goto :EOF
if not exist %1 @echo LwrCase - %1 NOT found.&goto :EOF
setlocal
for /f "Tokens=*" %%a in ('@echo %~a1') do (
 set file=%%a
)
if /i "%file:~0,1%" EQU "d" @echo LwrCase - %1 is NOT a file.&endlocal&goto :EOF
for /f "Tokens=*" %%f in ('dir %1 /L /b /a /a-d') do (
 Rename %1 "%%f"
)
endlocal

Convert all files in a folder to lower case.

@echo off
if {%1}=={} @echo Syntax: LwrCase_Folder FullyQualifiedDirectoryName&goto :EOF
if not exist %1 @echo LwrCase_Folder - %1 NOT found.&goto :EOF
setlocal
for /f "Tokens=*" %%a in ('@echo %~a1') do (
 set folder=%%a
)
if /i "%folder:~0,1%" NEQ "d" @echo LwrCase_Folder - %1 is NOT a folder.&endlocal&goto :EOF
pushd %1
set sw=/B /A /A-D
if /i {%2}=={/S} set sw=%sw% %2
for /f "Tokens=*" %%f in ('dir %sw%') do (
 call LwrCase "%%f"
)
popd
endlocal

Remove spaces from all files in a folder.

@echo off
setlocal enabledelayedexpansion
for %%j in (*.*) do (
set filename=%%~nj
set filename=!filename:.=!
set filename=!filename: =!
if not "!filename!"=="%%~nj" ren "%%j" "!filename!%%~xj"
)