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77 lines
1.8 KiB
Markdown
77 lines
1.8 KiB
Markdown
Script: *check-dns.ps1*
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========================
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This PowerShell script measures the DNS resolution speed (using 100 popular domains) and prints it.
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Parameters
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----------
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```powershell
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PS> ./check-dns.ps1 [<CommonParameters>]
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[<CommonParameters>]
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This script supports the common parameters: Verbose, Debug, ErrorAction, ErrorVariable, WarningAction,
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WarningVariable, OutBuffer, PipelineVariable, and OutVariable.
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```
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Example
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-------
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```powershell
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PS> ./check-dns.ps1
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✅ DNS resolves 56.5 domains per second
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```
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Notes
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-----
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Author: Markus Fleschutz | License: CC0
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Related Links
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-------------
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https://github.com/fleschutz/PowerShell
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Script Content
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--------------
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```powershell
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<#
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.SYNOPSIS
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Check the DNS resolution
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.DESCRIPTION
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This PowerShell script measures the DNS resolution speed (using 100 popular domains) and prints it.
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.EXAMPLE
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PS> ./check-dns.ps1
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✅ DNS resolves 56.5 domains per second
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.LINK
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https://github.com/fleschutz/PowerShell
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.NOTES
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Author: Markus Fleschutz | License: CC0
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#>
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try {
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Write-Progress "Measuring DNS resolution..."
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$table = Import-CSV "$PSScriptRoot/../data/popular-domains.csv"
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$numRows = $table.Length
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$stopWatch = [system.diagnostics.stopwatch]::startNew()
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if ($IsLinux) {
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foreach($row in $table){$nop=dig $row.Domain +short}
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} else {
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foreach($row in $table){$nop=Resolve-DNSName $row.Domain}
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}
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[float]$elapsed = $stopWatch.Elapsed.TotalSeconds
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Write-Progress -completed " "
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$average = [math]::round($numRows / $elapsed, 1)
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if ($average -lt 10.0) {
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Write-Host "⚠️ DNS resolves $average domains per second only"
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} else {
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Write-Host "✅ DNS resolves $average domains per second"
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}
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exit 0 # success
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} catch {
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"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
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exit 1
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}
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```
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*(generated by convert-ps2md.ps1 using the comment-based help of check-dns.ps1 as of 03/27/2024 17:36:24)*
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