Basic Commands

Create a directory if not exists

#create directory
if (!(Test-Path "C:\Directory")) { 
	New-Item -ItemType Directory -Path "C:\Directory" 
}

Remove directory if exist

#remove directory including all (sub)folders and files in it
if (Test-Path "C:\Directory") {
	Remove-Item -path "C:\Directory" -Recurse -Force
}

Delete item if exists

#remove item
if (Test-Path "C:\Users\Public\Desktop\Shortcut.lnk") {
	Remove-Item -path "C:\Users\Public\Desktop\Shortcut.lnk" -Force
}

Rename Folder

#Rename Folder
try {
	Rename-Item -Path "C:\FolderName" -NewName "C:\NewFolderName"
} catch {
}

Rename File

#Rename file 
try {
	Rename-Item -Path "C:\temp\FileName.txt" -NewName "C:\temp\NewFileName.txt"
} catch {
}

Copy a file

#Copy file 
if (Test-Path "C:\NewLocation") {
	Copy-Item -Path "C:\CurrentLocation\FileName.txt" -Destination "C:\NewLocation\FileName.txt" -Force
}

Copy all files and folders

#Copy all files and folders
if (Test-Path "C:\NewLocation") {
	Copy-Item -Path "C:\CurrentLocation\*" -Destination "C:\NewLocation" -Recurse -Force
}

Copy a file to all user profiles – PSADT

Copy-FileToUserProfiles -Path "$dirfiles\Shortcut.lnk" -Destination "Desktop" -Recurse

Remove a file in all user profiles – PSADT

Remove-FileFromUserProfiles -Path "Desktop\Shortcut.lnk" -Recurse

Stop running Service

#stop the service if it's running
if (Get-Service -Name "ServiceName" -ErrorAction SilentlyContinue | Where-Object { $_.Status -eq "Running" }) {
    Stop-Service -Name "ServiceName" -Force -ErrorAction SilentlyContinue
}

Stop running Process

#stop the process if it's running
$proc = Get-Process -Name "ProcessName" -ErrorAction SilentlyContinue
if ($proc) {
    Stop-Process -Name "ProcessName" -Force -ErrorAction SilentlyContinue
}

Unblock files all files in a folder

#unblock files
$path = "C:\Files"
Get-ChildItem -Path $path -Recurse | Unblock-File

Create local user and set password and add it to the local admin group

#generate a random password
$PW = Get-Random
$SecurePW = ConvertTo-SecureString -String $PW -AsPlainText -Force

#define the username
$UserName = "NewLocalUser"  # Replace with desired username

#create the local user
try {
    New-LocalUser -Name $UserName -Password $SecurePW -FullName "Local Admin User" -Description "Created via script" -PasswordNeverExpires $true
    Write-Host "User '$UserName' created successfully."
} catch {
    Write-Warning "Failed to create user '$UserName': $_"
}

#add user to the local Administrators group using SID
try {
    $adminGroupSID = 'S-1-5-32-544'
    Add-LocalGroupMember -Group $adminGroupSID -Member $UserName
    Write-Host "User '$UserName' added to Administrators group."
} catch {
    Write-Warning "Failed to add user '$UserName' to Administrators group: $_"
}

Set folder permissions to full control for all users

try {
    #grant Full Control (F) to the Users group (SID: S-1-5-32-545) on C:\Folder, recursively
    icacls.exe "C:\Folder" /grant "*S-1-5-32-545:(OI)(CI)F" /T
    Write-Host "Permissions successfully applied."
} catch {
    Write-Warning "Failed to set permissions: $_"
}

Add ODBC entries – PSADT

#add 32-bit ODBC DSNs
$odbcEntries = @(
    @{ Name = "ABC"; Server = "oracle"; User = "ABC" },
    @{ Name = "DEF"; Server = "oracle"; User = "DEF" },
    @{ Name = "GHI"; Server = "oracle"; User = "GHI" }
)
foreach ($entry in $odbcEntries) {
    $dsnPath = "HKLM:\SOFTWARE\WOW6432Node\ODBC\ODBC.INI\$($entry.Name)"
    $sourcesPath = "HKLM:\SOFTWARE\WOW6432Node\ODBC\ODBC.INI\ODBC Data Sources"
    try {
        Write-Log -Message "Creating ODBC DSN registry path: $dsnPath" -Severity 1
        New-Item -Path $dsnPath -Force -ErrorAction Stop | Out-Null
        Write-Log -Message "Setting ODBC DSN values for '$($entry.Name)'" -Severity 1
        Set-ItemProperty -Path $dsnPath -Name "Driver" -Value "C:\Windows\SysWOW64\msorcl32.dll" -ErrorAction Stop
        Set-ItemProperty -Path $dsnPath -Name "Server" -Value $entry.Server -ErrorAction Stop
        Set-ItemProperty -Path $dsnPath -Name "UID" -Value $entry.User -ErrorAction Stop
        Write-Log -Message "Adding DSN '$($entry.Name)' to ODBC Data Sources list" -Severity 1
        if (-not (Test-Path -Path $sourcesPath)) {
            Write-Log -Message "ODBC Data Sources key missing, creating it." -Severity 2
            New-Item -Path $sourcesPath -Force | Out-Null
        }
        Set-ItemProperty -Path $sourcesPath -Name $entry.Name -Value "Microsoft ODBC for Oracle" -ErrorAction Stop
        Write-Log -Message "Successfully added '$($entry.Name)' to ODBC Data Sources." -Severity 1
        Write-Log -Message "Successfully created ODBC DSN: $($entry.Name)" -Severity 1
    }
    catch {
        Write-Log -Message "Failed to create ODBC DSN '$($entry.Name)': $_" -Severity 3
    }
}

Remove ODBC entries – PSADT

#remove 32-bit ODBC DSNs
$odbcEntries = @(
    @{ Name = "ABC" },
    @{ Name = "DEF" },
    @{ Name = "GHI" }
)
foreach ($entry in $odbcEntries) {
    $dsnPath = "HKLM:\SOFTWARE\WOW6432Node\ODBC\ODBC.INI\$($entry.Name)"
    $sourcesPath = "HKLM:\SOFTWARE\WOW6432Node\ODBC\ODBC.INI\ODBC Data Sources"
    try {
        Write-Log -Message "Removing ODBC DSN registry path: $dsnPath" -Severity 1
        if (Test-Path -Path $dsnPath) {
            Remove-Item -Path $dsnPath -Recurse -Force -ErrorAction Stop
            Write-Log -Message "Successfully removed DSN path for '$($entry.Name)'" -Severity 1
        } else {
            Write-Log -Message "DSN path '$($entry.Name)' not found, skipping." -Severity 2
        }
        Write-Log -Message "Removing entry from ODBC Data Sources for '$($entry.Name)'" -Severity 1
        if (Test-Path -Path $sourcesPath) {
            if (Get-ItemProperty -Path $sourcesPath -Name $entry.Name -ErrorAction SilentlyContinue) {
                Remove-ItemProperty -Path $sourcesPath -Name $entry.Name -ErrorAction Stop
                Write-Log -Message "Successfully removed '$($entry.Name)' from ODBC Data Sources." -Severity 1
            } else {
                Write-Log -Message "ODBC Data Sources entry '$($entry.Name)' not found." -Severity 2
            }
        } else {
            Write-Log -Message "ODBC Data Sources key does not exist, skipping." -Severity 2
        }
    }
    catch {
        Write-Log -Message "Failed to remove DSN '$($entry.Name)': $_" -Severity 3
    }
}

Delete all files in folder and subfolders except of dll’s

$folderPath = "path"

#get all files in the folder and subfolders except .dll files
Get-ChildItem -Path $folderPath -Recurse -File | Where-Object { $_.Extension -ne ".dll" } | ForEach-Object {
    try {
        Remove-Item $_.FullName -Force
        Write-Host "Deleted:" $_.FullName
    } catch {
        Write-Warning "Could not delete:" $_.FullName
    }
}

Delete all files in folder and subfolders except all unsigned dll’s

#set the path to your main folder
$folderPath = "path"

#get all files in the folder and subfolders
Get-ChildItem -Path $folderPath -Recurse -File | ForEach-Object {
    try {
        if ($_.Extension -eq ".dll") {
            #check digital signature
            $signature = Get-AuthenticodeSignature $_.FullName
            if ($signature.Status -eq "Valid") {
                #delete signed DLLs
                Remove-Item $_.FullName -Force
                Write-Host "Deleted signed DLL:" $_.FullName
            } else {
                Write-Host "Kept unsigned DLL:" $_.FullName
            }
        } else {
            #delete all non-DLL files
            Remove-Item $_.FullName -Force
            Write-Host "Deleted non-DLL:" $_.FullName
        }
    } catch {
        Write-Warning "Could not delete:" $_.FullName
    }
}