Windows PowerShell command on Get-command Get-Alias

NAME

Get-Alias

SYNOPSIS

Gets the aliases for the current session.

SYNTAX

Get-Alias [-Definition ] [-Exclude ] [-Scope ] []

Get-Alias [[-Name] ] [-Exclude ] [-Scope ] []

DESCRIPTION

The Get-Alias cmdlet gets the aliases in the current session. This includes built-in aliases, aliases that you

have set or imported, and aliases that you have added to your Windows PowerShell profile.

By default, Get-Alias takes an alias and returns the command name. When you use the Definition parameter,

Get-Alias takes a command name and returns its aliases.

Beginning in Windows PowerShell 3.0, Get-Alias displays non-hyphenated alias names in an ->

format to make it even easier to find the information that you need.

PARAMETERS

-Definition

Specifies an array of aliases for the specified item. Enter the name of a cmdlet, function, script, file, or executable file. This parameter is called Definition , because it searches for the item name in the Definition property of the alias object. Required? false Position? named Default value None Accept pipeline input? False Accept wildcard characters? false

-Exclude

Specifies an array of items that this cmdlet omits. The value of this parameter qualifies the Name and

Definition parameters. Enter a name, a definition, or a pattern, such as s*. Wildcards are permitted.

Required? false Position? named Default value None Accept pipeline input? False Accept wildcard characters? false

-Name

Specifies the aliases that this cmdlet gets. Wildcards are permitted. By default, Get-Alias retrieves all

aliases defined for the current session. The parameter name Name is optional. You can also pipe alias names to

Get-Alias .

Required? false Position? 0 Default value None

Accept pipeline input? True (ByPropertyName, ByValue)

Accept wildcard characters? false

-Scope

Gets only the aliases in the specified scope. The acceptable values for this parameter are:

- Global

- Local

- Script

- A number relative to the current scope (0 through the number of scopes, where 0 is the current scope and 1

is its parent) Local is the default. For more information, see about_Scopes. Required? false Position? named Default value None Accept pipeline input? False Accept wildcard characters? false This cmdlet supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction, WarningVariable, OutBuffer, PipelineVariable, and OutVariable. For more information, see about_CommonParameters (https:/go.microsoft.com/fwlink/?LinkID=113216).

INPUTS

System.String

You can pipe alias names to Get-Alias .

OUTPUTS

System.Management.Automation.AliasInfo

Get-Alias returns an object that represents each alias. Get-Alias returns the same object for every alias, but

Windows PowerShell uses an arrow-based format to display the names of non-hyphenated aliases.

NOTES

* To create a new alias, use Set-Alias or New-Alias. To delete an alias, use Remove-Item.

* The arrow-based alias name format is not used for aliases that include a hyphen. These are likely to be

preferred substitute names for cmdlets and functions, instead of typical abbreviations or nicknames.

Example 1: Get all aliases in the current session

PS C:\>Get-Alias

CommandType Name

----------- ----

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 -> Clear-Host

Alias clhy -> Clear-History �?�

This command gets all aliases in the current session.

The output shows the -> format that was introduced in Windows PowerShell 3.0. This format is

used only for aliases that do not include hyphens, because aliases with hyphens are typically preferred names for cmdlets and functions, rather than nicknames.

Example 2: Get aliases by name

PS C:\>Get-Alias -Name g, s -Exclude Get-*

This command gets all aliases that begin with g or s, except for aliases that begin with Get-.

Example 3: Get aliases for a cmdlet

PS C:\>Get-Alias -Definition Get-ChildItem

This command gets the aliases for the Get-ChildItem cmdlet.

By default, the Get-Alias cmdlet gets the item name when you know the alias. The Definition parameter gets the

alias when you know the item name.

Example 4: Get aliases by property

PS C:\>Get-Alias | Where-Object {$_.Options -Match "ReadOnly"}

This command gets all aliases in which the value of the Options property is ReadOnly. This command provides a quick way to find the aliases that are built into Windows PowerShell, because they have the ReadOnly option.

Options is just one property of the AliasInfo objects that Get-Alias gets. To find all properties and methods of

AliasInfo objects, type `Get-Alias | get-member`.

Example 5: Get aliases by name and filter by beginning letter

PS C:\>Get-Alias -Definition "-PSSession" -Exclude e -Scope Global

This example gets aliases for commands that have names that end in -PSSession, except for those that begin with e.

The command uses the Scope parameter to apply the command in the global scope. This is useful in scripts when you want to get the aliases in the session.