Run PowerShell script to multiple servers remotely

• List all servers (better FQDN or IP) in a txt file name "servers.txt".
• Keep the PowerShell script (say script.ps1) at the same location as the text file.

$server=Get-Content C:\servers.txtInvoke-Command -ComputerName $server -FilePath C:\script.ps1

Get the list of all Hotfix in multiple servers for specific time period

• Create a text file (.txt) with the name "serverlist.txt" and mention all server's FQDN.
• In this example, we will get the hotfix details from 1st August to 30th August 2022.
• Note: The date in this script will be MM/DD/YYYY

$server = Get-Content .\serverlist.txtGet-Hotfix -ComputerName $server |
Where {
$_.InstalledOn -gt "8/1/2022" -AND $_.InstalledOn -lt "8/30/2022" } | Select-Object pscomputername,description,hotfixid,installedby,installedon |
Export-Csv August_Patch.csv

How to Backup all Microsoft DNS Zones

# Get the name of the server with the env variable
$DNSServer=get-content env:computername

# Define folder where to store DNS backup
$BackupFolder="C:\Windows\System32\DNS\Backup"

# Define file name where to store DNS settings
$DNSFile=Join-Path $BackupFolder "input.csv"

# Check if the folder already exists. If exists, delete all content
if (-not(test-path $BackupFolder)) {
new-item $BackupFolder -Type Directory | Out-Null
} else {
Remove-Item $BackupFolder"\*" -recurse
}

# Get DNS settings using WMI Object
$List = get-WMIObject -ComputerName $DNSServer -Namespace root\MicrosoftDNS -Class MicrosoftDNS_Zone

# Export information into input.csv file
$List | Select Name,ZoneType,AllowUpdate,@{Name="MasterServers";Expression={$_.MasterServers}},DsIntegrated | Export-csv $DNSFile -NoTypeInformation

# Call Dnscmd.exe to export DNS zones
$list | foreach {
$path="backup\"+$_.name
$cmd="dnscmd {0} /ZoneExport {1} {2}" -f $DNSServer,$_.Name,$path
Invoke-Expression $cmd
}

#End of script