PowerShell

New-Net IPAddress 
Set-DNSClientServerAddress
Test-NetConnection -Traceroute/ping/ports
Add-Computer -DomainName
Install-WindowsFeature
test-computersecurechannel -credential domain\admin -Repair (re-join domain)

set-netfirewallprofile -profile domain,public,private -enabled false
Get-ADForest <domain> | FT <role>
Move-ADDirectoryServerOperationsMasterRole (move roles)
Get-Hotfix
Export-Csv

Set-date 
Set-Timezone

Search-ADAccount -PasswordNeverExpires | out-gridview
search-adaccount -UsersOnly –AccountDisabled

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Search-ADAccount -UsersOnly -AccountInactive -TimeSpan 90 | Get-ADUser -Properities Name, sAMAccountName, givenName, sn, userAccountControl | Where {($_.userAccountControl -band 2) -eq $False} | Select Name, sAMAccountName, givenName, sn
-ComputersOnly
$paramhash=@{
UsersOnly = $True
AccountInactive = $True
TimeSpan = New-Timespan -Days 120
SearchBase = "OU=Employees,DC=globomantics,dc=local"
Server = "chi-dc04"
}
Search-ADAccount @paramHash | measure