Squid checker

#!/bin/bash
for center in pmtpa lopar knams yaseo
do
  echo "Checking $center squids:"
  for x in `host rr.$center.wikimedia.org | cut -f 4 -d ' '`
  do
    echo -n "$x "
    ab -n1 -X $x:80 http://en.wikipedia.org/robots.txt >/dev/null && echo "ok" || echo "FAIL"
  done
done