Percent signs (%) and question marks (?) in PowerShell "?"

After studying a problem, we found that PowerShell written on White Paper has the following statements:

$ FarmName = Get-spfarm |%{$ _. Name}

The author's PowerShell is weak and doesn't understand the meaning of the percentage sign. So he asked the expert Tracy Yu to get the following answer:

The percent sign is Alias in PowerShell, meaning ForEach-Object.

 

:

It is not recommended to use Alias when writing PowerShell, which is not easy for others to understand.

 

In addition, Alias can be modified by running the New-Alias command and using Set-Alias.

 

The complete list of all Alias by default is as follows:

CommandType Name Definition
-------------------------
Alias % ForEach-Object
Alias? Where-Object
Alias ac Add-Content
Alias asnp Add-PSSnapIn
Alias cat Get-Content
Alias cd Set-Location
Alias chdir Set-Location
Alias clc Clear-Content
Alias clear-Host
Alias clhy Clear-History
Alias cli Clear-Item
Alias clp Clear-ItemProperty
AliasClsClear-Host
Alias clv Clear-Variable
Alias compare Compare-Object
Alias copy Copy-Item
Alias cp Copy-Item
Alias cpi Copy-Item
Alias cpp Copy-ItemProperty
Alias cvpa Convert-Path
Alias dbp Disable-PSBreakpoint
Alias del Remove-Item
Alias diff Compare-Object
Alias dir Get-ChildItem
Alias ebp Enable-PSBreakpoint
Alias echo Write-Output
Alias epal Export-Alias
Alias epcsv Export-Csv
Alias epsn Export-PSSession
Alias erase Remove-Item
Alias etsn Enter-PSSession
Alias exsn Exit-PSSession
Alias fc Format-Custom
Alias fl Format-List
Alias foreach ForEach-Object
Alias ft Format-Table
Alias fw Format-Wide
Alias gal Get-Alias
Alias gbp Get-PSBreakpoint
Alias gc Get-Content
Alias gci Get-ChildItem
Alias gcm Get-Command
Alias gcs Get-PSCallStack
Alias gdr Get-PSDrive
Alias ghy Get-History
Alias gi Get-Item
Alias gjb Get-Job
Alias gl Get-Location
Alias gm Get-Member
Alias gmo Get-Module
Alias gp Get-ItemProperty
Alias gps Get-Process
Alias group Group-Object
Alias gsn Get-PSSession
Alias gsnp Get-PSSnapIn
Alias gsv Get-Service
Alias gu Get-Unique
Alias gv Get-Variable
Alias gwmi Get-WmiObject
Alias h Get-History
Alias history Get-History
Alias icm Invoke-Command
Alias iex Invoke-Expression
Alias ihy Invoke-History
Alias ii Invoke-Item
Alias ipal Import-Alias
Alias ipcsv Import-Csv
Alias ipmo Import-Module
Alias ipsn Import-PSSession
Alias ise powershell_ise.exe
Alias iwmi Invoke-WMIMethod
Alias kill Stop-Process
Alias lp Out-Printer
Alias ls Get-ChildItem
Alias man help
Alias md mkdir
Alias measure Measure-Object
Alias mi Move-Item
Alias mount New-PSDrive
Alias move Move-Item
Alias mp Move-ItemProperty
Alias mv Move-Item
Alias nal New-Alias
Alias ndr New-PSDrive
Alias ni New-Item
Alias nmo New-Module
Alias nsn New-PSSession
Alias nv New-Variable
Alias ogv Out-GridView
Alias oh Out-Host
Alias popd Pop-Location
Alias ps Get-Process
Alias pushd Push-Location
Alias pwd Get-Location
Alias r Invoke-History
Alias rbp Remove-PSBreakpoint
Alias rcjb Receive-Job
Alias rd Remove-Item
Alias rdr Remove-PSDrive
Alias ren Rename-Item
Alias ri Remove-Item
Alias rjb Remove-Job
Alias rm Remove-Item
Alias rmdir Remove-Item
Alias rmo Remove-Module
Alias rni Rename-Item
Alias rnp Rename-ItemProperty
Alias rp Remove-ItemProperty
Alias rsn Remove-PSSession
Alias rsnp Remove-PSSnapin
Alias rv Remove-Variable
Alias rvpa Resolve-Path
Alias rwmi Remove-WMIObject
Alias sajb Start-Job
Alias sal Set-Alias
Alias saps Start-Process
Alias sasv Start-Service
Alias systolic Data Set-PSBreakpoint
Alias SC Set-Content
Alias select Select-Object
Alias set-Variable
Alias si Set-Item
Alias sl Set-Location
Alias sleep Start-Sleep
Alias sort Sort-Object
Alias sp Set-ItemProperty
Alias spjb Stop-Job
Alias spps Stop-Process
Alias spsv Stop-Service
Alias start Start-Process
Alias sv Set-Variable
Alias swmi Set-WMIInstance
Alias tee-Object
Alias type Get-Content
Alias where Where-Object
Alias wjb Wait-Job
Alias write-Output

 

In addition, the Clear-screen command of PowerShell is Clear-Host and Alias is cls, which is the same as the Dos command.

 

References

==================================

A Cheat Sheet for All the * {_ (% # $] PowerShell Punctuation

Http://blogs.lessthandot.com/index.php/DataMgmt/DBAdmin/a-cheat-sheet-for-all

An A-Z Index of WindowsPowerShell 2.0Commands

Http://ss64.com/ps/