# Chapter5: Common Operation

## This section contain the following items:

* 1.Get disks information
* 2.Remove item
* 3.Sleep
* 4.Timer
* 5.Launch *.exe form* .ps1     
* 6.Check if 64bit operation system 
* 7.Get current dictionary
* 8.Use DISM to add/remove Windows components
* 9.Write log to text file
* 10.Check file exist or not
* 11.Check Network IP
* 12.Check Network connection type
* 1ˇ.Check Windows User/Password is valid

## 1.Get disks information

* Unknown (0)
* No Root Directory (1)
* Removable Disk (2)
* Local Disk (3)
* Network Drive (4)
* Compact Disc (5)
* RAM Disk (6)
  * 1.wmic logicaldisk
  * 2.example:

    ```
      GET-WMIOBJECT -query "SELECT * from win32_logicaldisk where DriveType = '3'"
    ```

## 2.Remove item

* 1.remove a file

  ```
    Remove-Item c:\scripts\test.txt
  ```
* 2.remove files under a specific folder:

  ```
    Remove-Item c:\scripts\#
  ```

## 3.Sleep

* start to sleep for 60 seconds: 

  ```
    start-sleep -Seconds 60     
  ```

## 4.Timer

```
      $elapsed = [System.Diagnostics.Stopwatch]::StartNew()
      write-host "Started at $(get-date)"
      sleep 20
      write-host "Ended at $(get-date)"
      write-host "Total Elapsed Time: $($elapsed.Elapsed.ToString())"
```

## 5.Launch *.exe form* .ps1

* Launch .exe with parameters

  ```
     start-process -filepath "$serverDrive\$serverShareFolder\uartecho.exe" -ArgumentList $ary[$i],"0",$Baurate,"1"
  ```
* start-process: 開啟一個thread並執行指定的程式
  * -filepath : 指定的程式路徑
  * -ArgumentList : 給程式的參數
* Launch multiple executable files at once
  * 有兩種方式:
    * 1.start process:
      * 先用start-process launch後再用Wait-Process

        ```
           $p = Start-Process -FilePath iperf.exe -ArgumentList "-s -u"
           $id=(get-process iperf).Id
           Wait-Process -id $id -timeout 20                              
           taskkill /T /F /PID $id
        ```
    * 2.System.Diagnostics.Process
      * 有時候使用第一種方式會wait失敗, 這邊可以使用第二種方式, 類似c#

        ```
          $myArray = @()
          $ary = $ports.Split(",");
          $length = $ary.length;
          for($i=0;$i -lt $length; $i++){
              $port = $ary[$i]
              $pinfo = New-Object System.Diagnostics.ProcessStartInfo
              $pinfo.FileName = "$serverDrive\$serverShareFolder\uartecho.exe"
              $pinfo.Arguments="$port 0 $Baurate 1"
              $pinfo.CreateNoWindow = $false
              $p = New-Object System.Diagnostics.Process
              $p.StartInfo = $pinfo
              $myArray += $p
            }

            for($i=0;$i -lt $length; $i++){
                $myArray[$i].Start() | Out-Null
            }
            for($i=0;$i -lt $length; $i++){
                $myArray[$i].WaitForExit()
            }
        ```
    * 1. execute exe without windows and wait

## 6.Check if 64bit operation system

* 1.Using the Get-WMiObject Cmdlet

  ```
        (gwmi win32_operatingsystem | select osarchitecture).osarchitecture 
  ```
* 2.Using powershell command

  ```
       $version  = [System.Environment]::OSVersion.Version
       $os = "10"
       if($version.major -eq "6"){
           $os = "7"
       }elseif($version.major -eq "10" -and
           $version.minor -eq "0" -and
           $version.build -eq "10240" -and
           $version.revision -eq "0" ){
           #Windows 10 ENT LTSB 64bit    
           $os = "10"
       }else{
           #Default Windows 10 ENT LTSB 64bit
           $os = "10"
       }
  ```

## 7.Get current dictionary

```
    Get-Location
```

## 8.Use DISM to add/remove Windows components

```
    Dism /online /Enable-Feature /FeatureName:IIS-WebServer /All /quiet /norestart
```

## 9.Write log to text file

```
            $domain>> "C:\Windows\System32\domain.txt"
```

## 10.Check file exist or not

```
            Test-Path c:\scripts\test.txt
```

## 11.Check Network IP

```
            $networks = Get-WmiObject -Class Win32_NetworkAdapterConfiguration -Filter IPEnabled=TRUE -ComputerName . 
```

## 12.Check Network connection type

```
            $NLMType = [Type]::GetTypeFromCLSID('DCB00C01-570F-4A9B-8D69-199FDBA5723B')
            $INetworkListManager = [Activator]::CreateInstance($NLMType)

            $NLM_ENUM_NETWORK_CONNECTED  = 3
            $NLM_NETWORK_CATEGORY_PUBLIC = 0x00
            $NLM_NETWORK_CATEGORY_PRIVATE = 0x01
            $UNIDENTIFIED = "Unidentified network"

            $INetworks = $INetworkListManager.GetNetworks($NLM_ENUM_NETWORK_CONNECTED)
```

## 13.Check Windows User/Password is valid

* 1.Use Get-Credential

  ```
    Try
    {
        Start-Process -FilePath cmd.exe /c -Credential ($C =Get-Credential)
        $Ptr = [System.Runtime.InteropServices.Marshal]::SecureStringToCoTaskMemUnicode($C.Password)
        $result = [System.Runtime.InteropServices.Marshal]::PtrToStringUni($Ptr)                                [System.Runtime.InteropServices.Marshal]::ZeroFreeCoTaskMemUnicode($Ptr)
            return 0

    }
    Catch
    {
        return -1
    }
  ```
* 2.Do not use Get-Credential

  ```
        try
        {
            $passwd = convertto-securestring -AsPlainText -Force -String $password
            $cred = new-object -typename System.Management.Automation.PSCredential -argumentlist "$domain\$username",$passwd
            Start-Process -FilePath cmd.exe /c -Credential ($cred ) 
            return 0
        }
        Catch
        {
            return -1
        }
  ```