1. Powershell - Alias
JASON

2. Cmdlet

(Get-Command –type Cmdlet).Length

3. Get-Command

The Get-Command cmdlet gets all commands that are installed on
the computer, including cmdlets, aliases, functions, workflows, filters,
scripts, and applications.

Example : Get-Command -CommandType Alias g*

4. Powershell Alias - Abbreviation

Get → g

Set → s

Item → i

Location → l

Command → cm

Get-Item → gi

Set-Item → si

Get-Location → gl

Get-Command → gcm

5. New-Alias

New-Alias [-Name] <string> [-Value] <string>

Example : New-Alias log Write-Host

Aliases created by using New-Alias are not saved after you exit the session
or close Windows PowerShell

You can use the Export-Alias cmdlet to save your alias information to a file

You can later use Import-Alias to retrieve that saved alias information.

6. Get-Alias

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.

Example : Get-Alias l*

Example : if(Get-Alias log)
{
log “Alias Exists”
}

7. Modify Alias

Example 1:


Example 2:


New-Alias log Write-Verbose –Force
Set-Alias log Write-Verbose
Example 3:



cd Alias:
Set-Item log Write-Verbose
Example 4:

cd Alias:

Set-Content log Write-Verbose

8. Getting to the Alias: Drive

This command changes the current location to the Alias: drive

To return to a file system drive, type the drive name. For example,
type "set-location c:".

Example :

PS C:UsersJason> cd alias:

PS Alias:> dir l*

9. PowerShell Drive

We connect to PowerShell Providers by mounting the Providers
PowerShell Drive(PSDrive)

10. Delete Alias

Use Remove-Item (del) cmlet

Example :

PS C:UsersJason> cd alias:

PS Alias:> del log

PS C:UsersJason> Remove-Item alias: log

11. Export-Alias

The Export-Alias cmdlet exports the aliases in the current session to a
file.

Example 1: Export-Alias aliases.txt

Example 2 : Export-Alias aliases.txt log*

Example 3 : Export-Alias aliases.txt trace* -append

Example 4 : Export-Alias aliases.ps1 trace* -as Script

12. Export-Alias

Export-Alias aliases.txt

13. Export-Alias

Export-Alias aliases.ps1 -as Script

14. Import-Alias

The Import-Alias cmdlet imports an alias list from a file.

Beginning in Windows PowerShell 3.0, as a security feature, ImportAlias does not overwrite existing aliases by default.

To overwrite an existing alias, after assuring that the contents of the
alias file is safe, use the Force parameter.

Example : Import-Alias aliases.txt

15. Q1

Get-ChildItem *.txt | Where-Object { $_.Length –gt 5KB } | ForEachObject { $_.Name }

Gci *.txt | ? { $_.Length –gt 5KB } | % { $_.Name }

16. Q2

是否可以建立一個為 「Get-Command」的別名??

Example:

New-Alias Get-Command dir

17. Reference

TechNet

http://technet.microsoft.com/en-us/library/ee176913.aspx