PowerShell获取系统环境变量

通过Get-ChildItem列出所有的环境变量

Get-ChildItem env:

Name                           Value
----                           -----
ALLUSERSPROFILE                C:\ProgramData
ANDROID_HOME                   C:\Users\linxmouse\AppData\Local\Android\Sdk
APPDATA                        C:\Users\linxmouse\AppData\Roaming
ChocolateyInstall              C:\ProgramData\chocolatey
ChocolateyLastPathUpdate       132333362211161774
CommonProgramFiles             C:\Program Files\Common Files
CommonProgramFiles(x86)        C:\Program Files (x86)\Common Files
CommonProgramW6432             C:\Program Files\Common Files
COMPUTERNAME                   DESKTOP-1FO62S5
ComSpec                        C:\WINDOWS\system32\cmd.exe
DriverData                     C:\Windows\System32\Drivers\DriverData
FLUTTER_STORAGE_BASE_URL       https://storage.flutter-io.cn
HALCONARCH                     x64-win64
HALCONEXAMPLES                 C:\Users\Public\Documents\MVTec\HALCON-17.12-Progress\examples
HALCONIMAGES                   C:\Users\Public\Documents\MVTec\HALCON-17.12-Progress\examples\images
HALCONROOT                     d:\Program Files\MVTec\HALCON-17.12-Progress
HOME                           C:\Users\linxmouse
HOMEDRIVE                      C:
HOMEPATH                       \Users\linxmouse
JAVA_HOME                      D:\Program Files\Java\jre1.8.0_251
LESSCHARSET                    utf-8
LOCALAPPDATA                   C:\Users\linxmouse\AppData\Local
LOGONSERVER                    \\DESKTOP-1FO62S5
NUMBER_OF_PROCESSORS           12
OneDrive                       C:\Users\linxmouse\OneDrive
OS                             Windows_NT
Path                           C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPo...
PATHEXT                        .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.CPL
PROCESSOR_ARCHITECTURE         AMD64
PROCESSOR_IDENTIFIER           Intel64 Family 6 Model 158 Stepping 10, GenuineIntel
PROCESSOR_LEVEL                6
PROCESSOR_REVISION             9e0a
ProgramData                    C:\ProgramData
ProgramFiles                   C:\Program Files
ProgramFiles(x86)              C:\Program Files (x86)
ProgramW6432                   C:\Program Files
PSModulePath                   C:\Users\linxmouse\Documents\WindowsPowerShell\Modules;C:\Program Files\WindowsPowerS...
PUB_HOSTED_URL                 https://pub.flutter-io.cn
PUBLIC                         C:\Users\Public
SystemDrive                    C:
SystemRoot                     C:\WINDOWS
TEMP                           C:\Users\LINXMO~1\AppData\Local\Temp
TMP                            C:\Users\LINXMO~1\AppData\Local\Temp
USERDOMAIN                     DESKTOP-1FO62S5
USERDOMAIN_ROAMINGPROFILE      DESKTOP-1FO62S5
USERNAME                       linxmouse
USERPROFILE                    C:\Users\linxmouse
VBOX_MSI_INSTALL_PATH          D:\Program Files\Oracle\VirtualBox\
windir                         C:\WINDOWS
WSLENV                         WT_SESSION::WT_PROFILE_ID
WT_PROFILE_ID                  {61c54bbd-c2c6-5271-96e7-009a87ff44bf}
WT_SESSION                     4dc413e1-5ed9-46d4-b4f0-5a2fec7aeb44
WXDRIVE_START_ARGS             --wxdrive-setting=0 --disable-gpu --disable-software-rasterizer --enable-features=Net...

通过ls列出所有的环境变量

ls env:

Name                           Value
----                           -----
ALLUSERSPROFILE                C:\ProgramData
ANDROID_HOME                   C:\Users\linxmouse\AppData\Local\Android\Sdk
APPDATA                        C:\Users\linxmouse\AppData\Roaming
ChocolateyInstall              C:\ProgramData\chocolatey
ChocolateyLastPathUpdate       132333362211161774
CommonProgramFiles             C:\Program Files\Common Files
CommonProgramFiles(x86)        C:\Program Files (x86)\Common Files
CommonProgramW6432             C:\Program Files\Common Files
COMPUTERNAME                   DESKTOP-1FO62S5
ComSpec                        C:\WINDOWS\system32\cmd.exe
DriverData                     C:\Windows\System32\Drivers\DriverData
FLUTTER_STORAGE_BASE_URL       https://storage.flutter-io.cn
HALCONARCH                     x64-win64
HALCONEXAMPLES                 C:\Users\Public\Documents\MVTec\HALCON-17.12-Progress\examples
HALCONIMAGES                   C:\Users\Public\Documents\MVTec\HALCON-17.12-Progress\examples\images
HALCONROOT                     d:\Program Files\MVTec\HALCON-17.12-Progress
HOME                           C:\Users\linxmouse
HOMEDRIVE                      C:
HOMEPATH                       \Users\linxmouse
JAVA_HOME                      D:\Program Files\Java\jre1.8.0_251
LESSCHARSET                    utf-8
LOCALAPPDATA                   C:\Users\linxmouse\AppData\Local
LOGONSERVER                    \\DESKTOP-1FO62S5
NUMBER_OF_PROCESSORS           12
OneDrive                       C:\Users\linxmouse\OneDrive
OS                             Windows_NT
Path                           C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPo...
PATHEXT                        .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC;.CPL
PROCESSOR_ARCHITECTURE         AMD64
PROCESSOR_IDENTIFIER           Intel64 Family 6 Model 158 Stepping 10, GenuineIntel
PROCESSOR_LEVEL                6
PROCESSOR_REVISION             9e0a
ProgramData                    C:\ProgramData
ProgramFiles                   C:\Program Files
ProgramFiles(x86)              C:\Program Files (x86)
ProgramW6432                   C:\Program Files
PSModulePath                   C:\Users\linxmouse\Documents\WindowsPowerShell\Modules;C:\Program Files\WindowsPowerS...
PUB_HOSTED_URL                 https://pub.flutter-io.cn
PUBLIC                         C:\Users\Public
SystemDrive                    C:
SystemRoot                     C:\WINDOWS
TEMP                           C:\Users\LINXMO~1\AppData\Local\Temp
TMP                            C:\Users\LINXMO~1\AppData\Local\Temp
USERDOMAIN                     DESKTOP-1FO62S5
USERDOMAIN_ROAMINGPROFILE      DESKTOP-1FO62S5
USERNAME                       linxmouse
USERPROFILE                    C:\Users\linxmouse
VBOX_MSI_INSTALL_PATH          D:\Program Files\Oracle\VirtualBox\
windir                         C:\WINDOWS
WSLENV                         WT_SESSION::WT_PROFILE_ID
WT_PROFILE_ID                  {61c54bbd-c2c6-5271-96e7-009a87ff44bf}
WT_SESSION                     4dc413e1-5ed9-46d4-b4f0-5a2fec7aeb44
WXDRIVE_START_ARGS             --wxdrive-setting=0 --disable-gpu --disable-software-rasterizer --enable-features=Net...

获取环境变量的值

$env:path
C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\Microsoft SQL Server\130\Tools\Binn\;C:\Program Files\Microsoft SQL Server\Client SDK\ODBC\170\Tools\Binn\;d:\Program Files\MVTec\HALCON-17.12-Progress\bin\x64-win64;d:\Program Files\Git\cmd;C:\Program Files\dotnet\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Users\linxmouse\AppData\Local\Programs\Python\Python37\Scripts\;C:\Users\linxmouse\AppData\Local\Programs\Python\Python37\;C:\Users\linxmouse\AppData\Local\Microsoft\WindowsApps;D:\Program Files\Java\jre1.8.0_251\bin;d:\Program Files\LLVM\bin;d:\Programs\Microsoft VS Code\bin;D:\flutter\bin;D:\flutter\.pub-cache\bin;D:\flutter\bin\cache\dart-sdk\bin;C:\Users\linxmouse\AppData\Local\Android\Sdk\tools;C:\Users\linxmouse\AppData\Local\Android\Sdk\platform-tools;D:\Program Files\protoc-3.11.4-win64\bin;C:\Users\linxmouse\.dotnet\tools;C:\Users\linxmouse\AppData\Local\Microsoft\WindowsApps;C:\Users\linxmouse\.dotnet\tools