$env:中的环境变量只是电脑环境变量的一个副本,除了用.NET方法更新环境变量,其他的更改在下一次重新打开时,会恢复如初。 通过$env:提示powershell忽略基本的variable:驱动器,先去环境变量env:驱动器中寻找变量。 通过“ls env:”可以查询所有的环境变量,通过“$env:name”就可以访问指定name的
function envAdder { <# .synopsis add a value to a specified environment variable often, the most useful variable is `Path`; and the most often operation is add value to the Path ; if the target value is no exist yet, then the function will try to create the corresponding variable for ...
del variable:a del Variable:pi -Force del Variable:zero -Force #constant 不可删除 Remove-Variable c 1. 2. 3. 4. 系统变量、自动变量: $HOME Get-Help about_Automatic_variables 1. 2. 3. 查看环境变量: $env:USERNAME ls env:USER* ls env: 1. 2. 3. 添加、更改、删除 当前环境变量(当前...
$action=New-ScheduledTaskAction-Execute"C:\Windows\System32\cmd.exe"-Argument"-c echo hellworld > D:\hello.txt"$trigger=New-ScheduledTaskTrigger-Once-At(Get-Date)$principal=New-ScheduledTaskPrincipal-UserId"$env:ComputerName\$env:UserName"-RunLevel Highest$settings=New-ScheduledTaskSettingsSet$ta...
同样,也可以使用 Get-Command 返回实际参数名称的列表,包括常用参数名称以及 WhatIf 和Confirm。 PowerShell 复制 (Get-Command -Name Test-MrSupportsShouldProcess).Parameters.Keys Output 复制 ComputerName Verbose Debug ErrorAction WarningAction InformationAction ErrorVariable WarningVariable InformationVariable ...
get help for a script that isn't located in a path that's listed in the `$env:Path` environment variable, type the script's path and file name. If you enter the exact name of a help article, `Get-Help` displays the article contents. If you enter a word or word pattern that ...
$Env:<variable-name> For example, to display the value of theWINDIRenvironment variable: PowerShell $Env:windir Output C:\Windows In this syntax, the dollar sign ($) indicates a variable, and the drive name (Env:) indicates an environment variable followed by the variable name (windir). ...
$Service='w32time';Get-Service-Name$Service Output Status Name DisplayName --- --- --- Running w32time Windows Time 许多编程和脚本语言都需要每行末尾的分号。 但是,在 PowerShell 中,行尾的分号是不必要的,不建议这样做。 应该避免使用它们,以使代码更简洁且更易于阅读。 左侧筛选器 本章演示...
As a security feature, PowerShell doesn't run executable commands, including PowerShell scripts and native commands, unless the command is located in a path listed in the $env:Path environment variable. To run an executable file that's in the current directory, specify the full path or use ...
{ Write-Error "BUILD_SOURCESDIRECTORY does not exist: $Env:BUILD_SOURCESDIRECTORY" exit 1 } Write-Verbose "BUILD_SOURCESDIRECTORY: $Env:BUILD_SOURCESDIRECTORY" # Make sure there's a build number if (-not $Env:BUILD_BUILDNUMBER) { Write-Error ("BUILD_BUILDNUMBER environment variable is ...