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Get-Alias

Updated: December 3, 2014

Applies To: Windows PowerShell 4.0

Get-Alias

Gets the aliases for the current session.

Aliases

The following abbreviations are aliases for this cmdlet:

  • gal

Syntax

Parameter Set: Default
Get-Alias [[-Name] <String[]> ] [-Exclude <String[]> ] [-Scope <String> ] [ <CommonParameters>]

Parameter Set: Definition
Get-Alias [-Definition <String[]> ] [-Exclude <String[]> ] [-Scope <String> ] [ <CommonParameters>]




Detailed Description

The Get-Alias cmdlet gets the aliases (alternate names for commands and executable files) 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 "<alias> -> <definition>" format to make it even easier to find the information that you need.

Parameters

-Definition<String[]>

Gets the 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.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

true

-Exclude<String[]>

Omits the specified items. 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.


Aliases

none

Required?

false

Position?

named

Default Value

none

Accept Pipeline Input?

false

Accept Wildcard Characters?

true

-Name<String[]>

Specifies the aliases to retrieve. 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.


Aliases

none

Required?

false

Position?

1

Default Value

All aliases

Accept Pipeline Input?

true (ByValue, ByPropertyName)

Accept Wildcard Characters?

true

-Scope<String>

Gets only the aliases in the specified scope. Valid values are "Global", "Local", or "Script", or 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.


Aliases

none

Required?

false

Position?

named

Default Value

Local

Accept Pipeline Input?

false

Accept Wildcard Characters?

false

<CommonParameters>

This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see  about_CommonParameters (http://go.microsoft.com/fwlink/p/?LinkID=113216).

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

  • System.String

    You can pipe alias names to Get-Alias.


Outputs

The output type is the type of the objects that the cmdlet emits.

  • 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.

Examples

-------------------------- EXAMPLE 1 --------------------------

This command gets all aliases in the current session.

The output shows the "<alias> -> <definition>" 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.


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 …

-------------------------- EXAMPLE 2 --------------------------

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


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

-------------------------- EXAMPLE 3 --------------------------

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.


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

-------------------------- EXAMPLE 4 --------------------------

This command retrieves 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".


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

-------------------------- EXAMPLE 5 --------------------------

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.


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

Related topics


Export-Alias

Import-Alias

New-Alias

Set-Alias

Alias Provider

about_Aliases



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