[Foreigner]

root221,

Код:

@echo off
setlocal

if not exist all_test.txt 1>all_test.txt echo 127.0.0.1
for /f %%i in (' findstr /v /g:all_test.txt spisok.txt ') do (

    1>>all_test.txt echo %%i
    1>nul ping -n 1 %%i && 1>>alive.txt echo %%i || 1>>err.txt echo %%i

)