mirror of
https://github.com/fleschutz/PowerShell.git
synced 2024-11-22 07:53:21 +01:00
74 lines
1.8 KiB
Markdown
74 lines
1.8 KiB
Markdown
The *check-dns.ps1* Script
|
|
===========================
|
|
|
|
This PowerShell script measures the DNS resolution speed using 100 internet domains and prints it.
|
|
|
|
Parameters
|
|
----------
|
|
```powershell
|
|
/home/markus/Repos/PowerShell/scripts/check-dns.ps1 [<CommonParameters>]
|
|
|
|
[<CommonParameters>]
|
|
This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction,
|
|
WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
|
|
```
|
|
|
|
Example
|
|
-------
|
|
```powershell
|
|
PS> ./check-dns.ps1
|
|
✅ Internet DNS lookups in 33.6ms
|
|
|
|
```
|
|
|
|
Notes
|
|
-----
|
|
Author: Markus Fleschutz | License: CC0
|
|
|
|
Related Links
|
|
-------------
|
|
https://github.com/fleschutz/PowerShell
|
|
|
|
Script Content
|
|
--------------
|
|
```powershell
|
|
<#
|
|
.SYNOPSIS
|
|
Check the DNS resolution
|
|
.DESCRIPTION
|
|
This PowerShell script measures the DNS resolution speed using 100 internet domains and prints it.
|
|
.EXAMPLE
|
|
PS> ./check-dns.ps1
|
|
✅ Internet DNS lookups in 33.6ms
|
|
.LINK
|
|
https://github.com/fleschutz/PowerShell
|
|
.NOTES
|
|
Author: Markus Fleschutz | License: CC0
|
|
#>
|
|
|
|
try {
|
|
$table = Import-CSV "$PSScriptRoot/../data/popular-domains.csv"
|
|
|
|
$stopWatch = [system.diagnostics.stopwatch]::startNew()
|
|
if ($IsLinux) {
|
|
foreach($row in $table){$nop=dig $row.Domain +short}
|
|
} else {
|
|
Clear-DnsClientCache
|
|
foreach($row in $table){$nop=Resolve-DNSName $row.Domain}
|
|
}
|
|
[float]$elapsed = $stopWatch.Elapsed.TotalSeconds * 1000.0
|
|
$speed = [math]::round($elapsed / $table.Length, 1)
|
|
if ($speed -gt 100.0) {
|
|
Write-Host "⚠️ Internet DNS lookups take $($speed)ms!"
|
|
} else {
|
|
Write-Host "✅ Internet DNS lookups in $($speed)ms"
|
|
}
|
|
exit 0 # success
|
|
} catch {
|
|
"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
|
|
exit 1
|
|
}
|
|
```
|
|
|
|
*(generated by convert-ps2md.ps1 using the comment-based help of check-dns.ps1 as of 11/08/2024 12:37:49)*
|