This script tests the connection to a specified URL and provides detailed timing information.

test_connection.md

Description

This script tests the connection to a specified URL and provides detailed timing information, useful for troubleshooting internet connectivity issues. It measures the time taken for various stages of the connection process, including:

Name lookup (DNS resolution) Connecting to the server Initiating data transfer Overall request completion This breakdown helps pinpoint potential bottlenecks in your network or the remote server.

Usage

./test_connection.sh <URL>

• Replace script_name.sh with the actual name of your script file.
• Replace with the website address you want to test the connection to.

Example

./test_connection.sh https://www.google.com

test_connection.sh

#!/bin/bash

if [ -z "$1" ]; then
  echo "Usage: $0 <URL>"
  exit 1
fi

URL="$1"

echo "Testing connection to $URL"

namelookup_time=$(curl -o /dev/null -s -w %{time_namelookup} $URL)
connect_time=$(curl -o /dev/null -s -w %{time_connect} $URL)
pretransfer_time=$(curl -o /dev/null -s -w %{time_pretransfer} $URL)
starttransfer_time=$(curl -o /dev/null -s -w %{time_starttransfer} $URL)
total_time=$(curl -o /dev/null -s -w %{time_total} $URL)

echo "Results:"
echo "  Name lookup time: $namelookup_time seconds"
echo "  Connect time: $connect_time seconds"
echo "  Pretransfer time: $pretransfer_time seconds"
echo "  Start transfer time: $starttransfer_time seconds"
echo "  Total time: $total_time seconds"