What are some useful PowerShell functions?

What are some useful PowerShell functions I can use for system administration?

PowerShell has many useful functions! For example, Get-Process retrieves running processes, and Get-Service shows services on your system.

Can you give me an example of a custom PowerShell function?

Sure! Here's a simple custom function that checks if a service is running:

function Check-ServiceStatus {
    param(
        [string]$ServiceName
    )
    Get-Service -Name $ServiceName | Select-Object Status
}

How can I export the output of a PowerShell function to a CSV file?

You can use the Export-Csv cmdlet. For example:

Get-Process | Export-Csv -Path 'processes.csv' -NoTypeInformation

What are some best practices for writing PowerShell functions?

Some best practices include using meaningful names, adding comments, validating parameters, and handling errors gracefully.