Squid metric script

cat squidcheck.sh
#!/bin/bash
VERSION="1.0"

function usage()
{
  echo "squidcheck  version: $VERSION"
  echo "usage:"
  echo "  $0 http_requests              - Number of HTTP requests received"
  echo "  $0 clients                    - Number of clients accessing cache"
  echo "  $0 icp_received               - Number of ICP messages received"
  echo "  $0 icp_sent                   - Number of ICP messages sent"
  echo "  $0 icp_queued                 - Number of queued ICP replies"
  echo "  $0 htcp_received              - Number of HTCP messages received"
  echo "  $0 htcp_sent                  - Number of HTCP messages sent"
  echo "  $0...