powershell 常用命令

#实例化对象,以SqlConnection为例子

$con = new - object System.Data.Sqlclient.SqlConnection( " server=.;uid=xxx;pwd=xxx " )

#引用静态方法

$strMachineName = [System.Environment] :: MachineName
$result = [System.Math] :: Pow( 2 , 3 )

#列出以sql开头的进程

get - process  sql *

#列出所有进程，按照占用的workingset大小降序排列

get - process   |  sort - object workingset  - desceding 

#列出本机共享

get - wmiobject win32_share

 

#得到实际的cpu个数

get - wmiobject  - query  " select *from Win32_Processor "

 

 

#如何使用if else,foreach ,  得到所有的服务，安装服务状态进行排序   1

$serviceArray=get-service | sort-object status -descending 
foreach ($temp in $serviceArray)
{
    if($temp.status -eq "stopped")
    {
         write-host "The" $temp.name "is stopped"  -foreground red
    }
    elseif($temp.status -eq "running")
    {
         write-host "The" $temp.name "is running"  -foreground green
    }
    else 
    {
       write-host "The" $temp.name "status is " $temp.status -foreground yellow
    }
}

 

#如何使用if else,foreach ,  得到所有的服务，安装服务状态进行排序    2

 

get - service  |  sort - object status  - descending  |
foreach  {
  if ( $_ .status  -eq   " stopped " )
 {
   write - host  " The "   $_ .name  " is stopped "    - foreground red
 }
  elseif ( $_ .status  -eq   " running " )
 {
   write - host  " The "   $_ .name  " is running "    - foreground green
 }
  else  
 {
    write - host  " The "   $_ .name  " status is  "   $_ .status  - foreground yellow
 }
}

 

 

 #如何使用switch ,  得到所有的服务，安装服务状态进行排序

 

get - service  |  sort - object status  - descending  |
foreach  {
switch ( $_ .status) 
  {
      " stopped "
    {
         write - host  " The "   $_ .name  " is stopped "    - foreground red
    }
     " running "
    {
         write - host  " The "   $_ .name  " is running "    - foreground green
    }
     default
    {
       write - host  " The "   $_ .name  " status is  "   $_ .status  - foreground yellow
    }
   }
}

 

 

 #switch 通配符,统计出包含“sql”关键字的字符串数量

 

$counter = 0
$stringArray = " sqlserver " , " t-sql " , " serviceBroker " , " TDE "   |
foreach  {
switch   -wildcard  ( $_ ) 
  {
      " *sql* "
    {
         $counter ++
    }
     default
    {
       write - host  $_  
    }
   }
}
Write - host  " there are  "   $counter   " terms contain sql "

 

 
#switch 正则表达式

 

$stringArray = " sqlserver " , " t-sql " , " serviceBroker " , " TDE " , " The version of sqlserver is 2008, and the edition is enterprise "   |
foreach  {
switch   -regex  ( $_ ) 
  {
      " sql.*?\d+ " # 包含sql，并且后面至少有一个数字
    {
           write - host  $_   - foreground red
    }
     default
    {
       write - host  $_  
    }
   }
}

 

 #得到状态为"运行"的服务 get-service

$strState = " running "
get - service  |  where - object { $_ .status  -eq   $strState }

#得到状态为"运行"的服务 get-wmiobject

$strState = " running "
get - wmiobject win32_service  - Filter   " state='$strState' "

 

#将内容写入文件, out-file cmdlet

$strState = " running "
$strPath = " c:\runningService.txt "
get - service  |  where - object { $_ .status  -eq   $strState }  |  out -file   - filepath  $strPath

 #查找字符串

 

 

param ( $folder = " C:\TEMP " , $keywords = " *xyz* " ,  $extension = " .txt " )

$files = get - childitem  $folder   - recurse  |  where { $_ .extension   -eq   $extension  }  |
foreach ( $_ ){
$fileFullName =   $_ .FullName
$content = get - content  $fileFullName
switch   -wildcard  ( $content )
 {
                 $keywords
                {
                                write - host  $fileFullName
                }
                 default
                {
                                #  write-host $content
                }
 }
}