So I decided to answer that with blog post in which a similar script divides lines of a text files between two text files. Nothing fancy, it's rather basic script :)
This script just checks whether the line count increment is either odd or even. Based on that outcome, the results goes to output file 1 or 2.
#Script initialization
$linecount = 0
$sourcefilename = Read-Host "What is the full path and name of the log file from which you want to divide the lines? (e.g. D:\mylogfiles\mylog.txt) "
$destinationfolderpath = Split-Path $sourcefilename -parent
$srcfile = gci $sourcefilename
$filebasename = $srcfile.BaseName
$fileext = $srcfile.Extension
#Functions
Function check-even ($num) {[bool]!($num%2)}
#Main
Get-Content $sourcefilename | Measure-Object | ForEach-Object { $sourcelinecount = $_.Count }
Write-Host "Your current file size is $sourcelinecount lines long"
Write-Host File is $sourcefilename - destination is $destinationfolderpath
$content = get-content $sourcefilename | % {
$linecount ++
If(Check-Even($linecount)) {
Write-Host "Writing part: $destinationfolderpath\$filebasename`_part2$fileext"
Add-Content $destinationfolderpath\$filebasename`_part2$fileext "$_"
} else {
Write-Host "Writing part: $destinationfolderpath\$filebasename`_part1$fileext"
Add-Content $destinationfolderpath\$filebasename`_part1$fileext "$_"
}
}
