Powershell

Simple Powershell examples

Adding script to shell as function when Powershell loads (.bashrc/.profile equivalent)

New-Item $profile -Type File -Force

Navigate to the location of the created file and then create functions i.e.

Function grep { 
   & 'C:\Documents and Settings\rsailopal\Documents\Powershell1\grep1.ps1' 
}

Additional Commands

List installed software:

Get-WMIObject -Class Win32_Product | Select-Object -Property Name

Parse logs:

Get-Eventlog -List

Get a list of the log types

Get-WinEvent -Logname Application -MaxEvents 5

Get the last 5 application errors

Remote Connections

Enable-PSRemoting -Force

Enable remote connection to machine

$hostnme = hostname

Invoke-Command -ComputerName $hostnme -ScriptBlock { hostname }

Execute the command hostname on the localhost

$hostnme = hostname

$s = New-PSSession -ComputerName $hostnme

Invoke-Command -Session $s { hostname }

Execute the same command creating a persistent session (variables created remotely are persisted across Invoke-Command calls)

Environmental Variables

Get-ChildItem -Path Env:

Get environmental variables.

Memory usage

systeminfo | ForEach-Object { If ( $_ -like "*Memory*") { Write-Host $_ } }

CPU utlisation

Get-WmiObject Win32_Processor | Measure-Object -Property LoadPercentage -Average | Select Average