PowerShell commands to remember

UPTIME

Command to display the days of uptime.  Perfect for checking to see how long (in days) a computer has been running if you want to nag the user to reboot after windows updates have been installed.

Version 1:

powershell.exe -command (get-date)-([System.Management.ManagementDateTimeconverter]::ToDateTime((Get-WmiObject win32_operatingsystem).lastbootuptime)) ^| select -ExpandProperty days

Version 2:

$os = Get-WmiObject win32_operatingsystem; $uptime = (Get-Date) – ($os.ConvertToDateTime($os.lastbootuptime)); Write-Host $Uptime.Days

Active Directory Last Password Change

get-aduser -filter * -properties passwordlastset, passwordneverexpires | ft Name, passwordlastset, Passwordneverexpires

spit it out as a report:

get-aduser -filter * -properties passwordlastset, passwordneverexpires | ft Name, passwordlastset, Passwordneverexpires | Out-File C:\path\lastpasswordlist.txt

Active Directory Last Password Change, if the account is enabled, and last logon date

get-aduser -filter * -properties passwordlastset, passwordneverexpires, enabled, lastlogondate | ft Name, passwordlastset, Passwordneverexpires, enabled, lastlogondate | Out-File C:\path\ADaccountStatus.txt

Active Directory Last time computer connected to domain

Get-ADComputer -Filter * -Properties * | Sort LastLogon | Select Name, LastLogonDate,@{Name=’LastLogon’;Expression={[DateTime]::FromFileTime($_.LastLogon)}}

and

Get-ADComputer –Filter * -Properties * | Sort LastLogon | Select Name, LastLogonDate,@{Name=’LastLogon’;Expression={[DateTime]::FromFileTime($_.LastLogon)}} | Export-Csv C:\adcomputers-last-logon.csv -NoTypeInformation

Run powershell commands on remotely another computer

Invoke-Command -ComputerName COMPUTERNAME -ScriptBlock {
msiexec /package c:\path\installer.msi /quiet /norestart
}

Invoke-Command -ComputerName COMPUTERNAME -ScriptBlock {
get-localuser
}