Check internet connection speed using curl's result. :-)

checkspeed.sh

#!/bin/bash

# clear log
cat /dev/null > speed.log

for i in {0..15}
do
  echo "Starting $i/15"
  echo "speedtest server" >> speed.log
  date >> speed.log
  curl -w '%{size_download},%{speed_download}' -o /dev/null http://speedtest.wdc01.softlayer.com/downloads/test10.zip >>speed.log
  echo "" >>speed.log
  echo "colish server" >> speed.log
  date >> speed.log
  curl -w '%{size_download},%{speed_download}' -o /dev/null http://colish.net/test10.zip >>speed.log
  echo "" >>speed.log
  echo "Finished $i/15"
  echo "Sleeping 60 seconds."
  sleep 60
done