test network latency and packet loss

test_network.sh

#!/bin/bash
 
log_file=/var/log/curl_error.log
max_age=86400 # one day in seconds
max_loop=1000 # maximum number of loops to execute
loop_count=0  # current number of loops executed
 
if [ ! -f "$log_file" ]; then
  touch "$log_file"
fi
 
while [ $loop_count -lt $max_loop ]; do
  if ! curl -sSf https://downloads.wordpress.org/ | grep -q 'nginx'; then
    current_time=$(date '+%Y-%m-%d %H:%M:%S')
    echo "Error: $current_time" >> "$log_file"
  fi
  sleep 2
  loop_count=$((loop_count+1))
  if [ $(($(date +%s) - $(date -r "$log_file" +%s))) -ge $max_age ]; then
    mv "$log_file" "$log_file.old"
    touch "$log_file"
  fi
done