Powershell Hostfile Replacement
Script to replace existing Hostfile entries with the below specified addresses instead.
hostfile-replace.ps1
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Set-ExecutionPolicy -ExecutionPolicy Unrestricted
$ip1 = "1.1.1.1"
$ip2 = "8.8.8.8"
$hst1 = "example.co.uk"
$hst2 = "example.com"
$hostFilePath = "$($env:windir)\system32\Drivers\etc\hosts"
$hostfile = Get-Content -Path $hostFilePath
$newHostFileEntry1 = "{0} {1}" -f $ip1, $hst1
$newHostFileEntry2 = "{0} {1}" -f $ip2, $hst2
# Delete all text after what is defined as $matchString
$lastIndexOfNewArray = 0
$matchString = '127.0.0.1\s+localhost'
for ($index = 0; $index -lt $hostfile.Count; $index++) {
if ($hostfile[$index] -match $matchString) {
$lastIndexOfNewArray = $index
break
}
}
$newHostFileContent = $Hostfile[0..$lastIndexOfNewArray]
# Adds entry for local IP address if conditions resolve to $true
if ($newHostFileContent -notcontains "127.0.0.2 hostname1" -and
(-not($newHostFileContent -like $newHostFileEntry1))) {
$newHostFileContent = New-Object System.Collections.ArrayList(,$newHostFileContent)
$newHostFileContent.Add($newHostFileEntry1) > $null
$newHostFileContent.Add($newHostFileEntry2) > $null
}
Out-File -Encoding UTF8 -FilePath $hostFilePath -InputObject $newHostFileContent -Append:$false -Confirm:$false