Deleting last n lines from file using batch file

Question

How to delete last n lines from file using batch script

I don\'t have any idea about batch files, I am writing batch file for the first time.

How should I wr

Answer 1

This the complete script for remove last N line

• count the total line
• set Line = Line - N , remain just processing lines number

@echo OFF
setlocal EnableDelayedExpansion

set LINES=0
for /f "delims==" %%I in (infile.txt) do (
    set /a LINES=LINES+1    
)

echo Total Lines : %LINES%
echo.

:: n = 5 , last 5 line will ignore 
set /a LINES=LINES-5

call:PrintFirstNLine > output.txt

goto EOF

:PrintFirstNLine
set cur=0
for /f "delims==" %%I in (infile.txt) do (      
    echo %%I        
    ::echo !cur! : %%I      
    set /a cur=cur+1    
    if "!cur!"=="%LINES%" goto EOF
) 

:EOF 

exit /b

Here call:PrintFirstNLine > output.txt will give the output in an external file name as output.txt

Output for sample Input

      
      
            
    D:\CBA\CBA_Notifier\Project_Name\IPS-Util.jar      
    D:\CBA\CBA_Notifier\Project_Name\Notifier.bat      
    D:\CBA\CBA_Notifier\Project_Name\Notifier.xml      
    D:\CBA\CBA_Notifier\Project_Name\Notifier.jar              
           
          
        D:\CBA\CBA_Notifier\IPS-Util.bat   

remove last 5 line

Update

:PrintFirstNLine
set cur=0
for /F "tokens=1* delims=]" %%I in ('type "infile.txt" ^| find /V /N ""') do (
   if "%%J"=="" (echo.) else (
        echo.%%J
        set /a cur=cur+1    
        )  

   if "!cur!"=="%LINES%" goto EOF
)