关于获取windows系统参数方法

前一阵写了一个获取网络内主机类型的脚本，没有写任何解释类的说明直接发上来造成好多兄弟们有很多疑问。今天就拣几个有特点的功能说明一下。
获取windows系统或者性能参数。
在powershell出现之前系统管理员习惯用VB来实现获取以上参数的功能（当然现在也可以），但本次文章的重点主是说powershell怎么实现获取以上参数信息，Powershell提供了很多扩展的功能可以直接访问.net框架，WMI，COM自动化和API的调用等。
下面我们举例说明一哈通过WMI获取主机的内存信息：
1获取本地主机空余内存大小：

[PS] C:\>(GWMI win32_OperatingSystem).FreePhysicalMemory
1245384

2获取本地主机的总内存大小：

[PS] C:\>(GWMI win32_OperatingSystem).TotalVisibleMemorySize
4166596

3如果我们想查看还能查看还有哪些类可以获取，按如下操作就可以看到：

[PS] C:\>GWMI win32_OperatingSystem | Get-Member
TypeName: System.Management.ManagementObject#root\cimv2\Win32_OperatingSystem
Name                                      MemberType   Definition
----                                      ----------   ----------
Reboot                                    Method       System.Management.ManagementBaseObject Reboot()
SetDateTime                               Method       System.Management.ManagementBaseObject SetDateTime(System.String LocalDateTi
Shutdown                                  Method       System.Management.ManagementBaseObject Shutdown()
Win32Shutdown                             Method       System.Management.ManagementBaseObject Win32Shutdown(System.Int32 Flags, Sys
Win32ShutdownTracker                      Method       System.Management.ManagementBaseObject Win32ShutdownTracker(System.UInt32 Ti
BootDevice                                Property     System.String BootDevice {get;set;}
BuildNumber                               Property     System.String BuildNumber {get;set;}
BuildType                                 Property     System.String BuildType {get;set;}
Caption                                   Property     System.String Caption {get;set;}
CodeSet                                   Property     System.String CodeSet {get;set;}
CountryCode                               Property     System.String CountryCode {get;set;}
CreationClassName                         Property     System.String CreationClassName {get;set;}
CSCreationClassName                       Property     System.String CSCreationClassName {get;set;}
CSDVersion                                Property     System.String CSDVersion {get;set;}
CSName                                    Property     System.String CSName {get;set;}
CurrentTimeZone                           Property     System.Int16 CurrentTimeZone {get;set;}
DataExecutionPrevention_32BitApplications Property     System.Boolean DataExecutionPrevention_32BitApplications {get;set;}
DataExecutionPrevention_Available         Property     System.Boolean DataExecutionPrevention_Available {get;set;}
DataExecutionPrevention_Drivers           Property     System.Boolean DataExecutionPrevention_Drivers {get;set;}
DataExecutionPrevention_SupportPolicy     Property     System.Byte DataExecutionPrevention_SupportPolicy {get;set;}
Debug                                     Property     System.Boolean Debug {get;set;}
Description                               Property     System.String Description {get;set;}
Distributed                               Property     System.Boolean Distributed {get;set;}
EncryptionLevel                           Property     System.UInt32 EncryptionLevel {get;set;}
ForegroundApplicationBoost                Property     System.Byte ForegroundApplicationBoost {get;set;}
FreePhysicalMemory                        Property     System.UInt64 FreePhysicalMemory {get;set;}
FreeSpaceInPagingFiles                    Property     System.UInt64 FreeSpaceInPagingFiles {get;set;}
FreeVirtualMemory                         Property     System.UInt64 FreeVirtualMemory {get;set;}
InstallDate                               Property     System.String InstallDate {get;set;}
LargeSystemCache                          Property     System.UInt32 LargeSystemCache {get;set;}
LastBootUpTime                            Property     System.String LastBootUpTime {get;set;}
LocalDateTime                             Property     System.String LocalDateTime {get;set;}
Locale                                    Property     System.String Locale {get;set;}
Manufacturer                              Property     System.String Manufacturer {get;set;}
MaxNumberOfProcesses                      Property     System.UInt32 MaxNumberOfProcesses {get;set;}
MaxProcessMemorySize                      Property     System.UInt64 MaxProcessMemorySize {get;set;}
MUILanguages                              Property     System.String[] MUILanguages {get;set;}
Name                                      Property     System.String Name {get;set;}
NumberOfLicensedUsers                     Property     System.UInt32 NumberOfLicensedUsers {get;set;}
NumberOfProcesses                         Property     System.UInt32 NumberOfProcesses {get;set;}
NumberOfUsers                             Property     System.UInt32 NumberOfUsers {get;set;}
OperatingSystemSKU                        Property     System.UInt32 OperatingSystemSKU {get;set;}
Organization                              Property     System.String Organization {get;set;}
OSArchitecture                            Property     System.String OSArchitecture {get;set;}
OSLanguage                                Property     System.UInt32 OSLanguage {get;set;}
OSProductSuite                            Property     System.UInt32 OSProductSuite {get;set;}
OSType                                    Property     System.UInt16 OSType {get;set;}
OtherTypeDescription                      Property     System.String OtherTypeDescription {get;set;}
PAEEnabled                                Property     System.Boolean PAEEnabled {get;set;}
PlusProductID                             Property     System.String PlusProductID {get;set;}
PlusVersionNumber                         Property     System.String PlusVersionNumber {get;set;}
Primary                                   Property     System.Boolean Primary {get;set;}
ProductType                               Property     System.UInt32 ProductType {get;set;}
RegisteredUser                            Property     System.String RegisteredUser {get;set;}
SerialNumber                              Property     System.String SerialNumber {get;set;}
ServicePackMajorVersion                   Property     System.UInt16 ServicePackMajorVersion {get;set;}
ServicePackMinorVersion                   Property     System.UInt16 ServicePackMinorVersion {get;set;}
SizeStoredInPagingFiles                   Property     System.UInt64 SizeStoredInPagingFiles {get;set;}
Status                                    Property     System.String Status {get;set;}
SuiteMask                                 Property     System.UInt32 SuiteMask {get;set;}
SystemDevice                              Property     System.String SystemDevice {get;set;}
SystemDirectory                           Property     System.String SystemDirectory {get;set;}
SystemDrive                               Property     System.String SystemDrive {get;set;}
TotalSwapSpaceSize                        Property     System.UInt64 TotalSwapSpaceSize {get;set;}
TotalVirtualMemorySize                    Property     System.UInt64 TotalVirtualMemorySize {get;set;}
TotalVisibleMemorySize                    Property     System.UInt64 TotalVisibleMemorySize {get;set;}
Version                                   Property     System.String Version {get;set;}
WindowsDirectory                          Property     System.String WindowsDirectory {get;set;}
__CLASS                                   Property     System.String __CLASS {get;set;}
__DERIVATION                              Property     System.String[] __DERIVATION {get;set;}
__DYNASTY                                 Property     System.String __DYNASTY {get;set;}
__GENUS                                   Property     System.Int32 __GENUS {get;set;}
__NAMESPACE                               Property     System.String __NAMESPACE {get;set;}
__PATH                                    Property     System.String __PATH {get;set;}
__PROPERTY_COUNT                          Property     System.Int32 __PROPERTY_COUNT {get;set;}
__RELPATH                                 Property     System.String __RELPATH {get;set;}
__SERVER                                  Property     System.String __SERVER {get;set;}
__SUPERCLASS                              Property     System.String __SUPERCLASS {get;set;}
FREE                                      PropertySet  FREE {FreePhysicalMemory, FreeSpaceInPagingFiles, FreeVirtualMemory, Name}
PSStatus                                  PropertySet  PSStatus {Status, Name}
ConvertFromDateTime                       ScriptMethod System.Object ConvertFromDateTime();
ConvertToDateTime                         ScriptMethod System.Object ConvertToDateTime();

4 如果我们想获取远程主机的参数应该怎么操作呢只需加上-computer参数比如：

[PS] C:\>(GWMI -computer bjexfe01  win32_OperatingSystem).TotalVisibleMemorySize
33543988