Create Log File in Powershell

I have the below code and currently it loads all the information on screen. I want it to log to a log file on D:\Apps\Logs.

The log file needs to have the name of the computer it is loading against - so COMPUTERNAME.log

Any idea how I can do this?

Thanks

$computer = gc env:computername

$onetcp = ((get-childitem c:\windows\system32\drivers\tcpip.sys).Versioninfo.ProductMajorPart).tostring() $twotcp = ((get-childitem c:\windows\system32\drivers\tcpip.sys).Versioninfo.ProductMinorPart).tostring() $threetcp = ((get-childitem c:\windows\system32\drivers\tcpip.sys).Versioninfo.ProductBuildPart).tostring() $fourtcp = ((get-childitem c:\windows\system32\drivers\tcpip.sys).Versioninfo.ProductPrivatePart).tostring()


$onedfsr = ((get-childitem c:\windows\system32\dfsrs.exe).Versioninfo.ProductMajorPart).tostring() $twodfsr = ((get-childitem c:\windows\system32\dfsrs.exe).Versioninfo.ProductMinorPart).tostring() $threedfsr = ((get-childitem c:\windows\system32\dfsrs.exe).Versioninfo.ProductBuildPart).tostring() $fourdfsr = ((get-childitem c:\windows\system32\dfsrs.exe).Versioninfo.ProductPrivatePart).tostring()

write-host TCPIP.sys Version on $computer is: "$onetcp.$twotcp.$threetcp.$fourtcp" Write-Host write-host DFSRS.exe Version on $computer is: "$onedfsr.$twodfsr.$threedfsr.$fourdfsr"

Write-Host

If (get-wmiobject win32_share | where-object {$_.Name -eq "REMINST"}) {   Write-Host "The REMINST share exists on $computer" } Else {   Write-Host "The REMINST share DOES NOT exist on $computer - Please create as per standards"  }   Write-Host

$hotfix1 = Get-HotFix -Id KB2450944 -ErrorAction SilentlyContinue $hotfix2 = Get-HotFix -Id KB2582284 -ErrorAction SilentlyContinue $hotfix3 = Get-HotFix -Id KB979808 -ErrorAction SilentlyContinue

If ($hotfix1) {     Write-Host "Hotfix KB2450944 is installed"
-BackgroundColor Green -ForegroundColor Black   } else {    Write-Host "Hotfix KB2450944 is NOT installed - Please ensure you install this hotfix" -ForegroundColor "red"   }


If ($hotfix2) {     Write-Host "Hotfix KB2582284 is installed"
-BackgroundColor Green -ForegroundColor Black   } else {    Write-Host "Hotfix KB2582284 is NOT installed - Please ensure you install this hotfix" -ForegroundColor "red"   }

If ($hotfix3) {     Write-Host "Hotfix KB979808 is installed"
-BackgroundColor Green -ForegroundColor Black   } else {    Write-Host "Hotfix KB979808 is NOT installed - Please ensure you install this hotfix" -ForegroundColor "red"    }

Solution 1:

Put this at the top of your file:

$Logfile = "D:\Apps\Logs\$(gc env:computername).log"

Function LogWrite
{
   Param ([string]$logstring)

   Add-content $Logfile -value $logstring
}

Then replace your Write-host calls with LogWrite.

Solution 2:

A function that takes these principles a little further.

1. Add's timestamps - can't have a log without timestamps.
2. Add's a level (uses INFO by default) meaning you can highlight big issues.

3. Allows for optional console output. If you don't set a log destination, it simply pumps it out.

   Function Write-Log {
       [CmdletBinding()]
       Param(
       [Parameter(Mandatory=$False)]
       [ValidateSet("INFO","WARN","ERROR","FATAL","DEBUG")]
       [String]
       $Level = "INFO",
   
       [Parameter(Mandatory=$True)]
       [string]
       $Message,
   
       [Parameter(Mandatory=$False)]
       [string]
       $logfile
       )
   
       $Stamp = (Get-Date).toString("yyyy/MM/dd HH:mm:ss")
       $Line = "$Stamp $Level $Message"
       If($logfile) {
           Add-Content $logfile -Value $Line
       }
       Else {
           Write-Output $Line
       }
   }
   

Solution 3:

I believe this is the simplest way of putting all what it is on the screen into a file. It is a native PS CmdLet so you don't have to change or install anything in your script

Start-Transcript -Path Computer.log

Write-Host "everything will end up in Computer.log"

Stop-Transcript

Solution 4:

function WriteLog
{
    Param ([string]$LogString)
    $LogFile = "C:\$(gc env:computername).log"
    $DateTime = "[{0:MM/dd/yy} {0:HH:mm:ss}]" -f (Get-Date)
    $LogMessage = "$Datetime $LogString"
    Add-content $LogFile -value $LogMessage
}

WriteLog "This is my log message"