DIY simple uptime checker via shell

DIY-siteuptime.sh

### Credentials file '/home/user/.credentials.txt for additional protection be chmod to 600.
### Sample creds content:
###     --user youruser:password_here
### This could then be run from cron every 15mins:
###      */15 * * * * /home/user/monitor.sh
###

#!/bin/bash

site_urls="https://www.google.com http://ismael.casimpan.com/"

for each_url in $site_urls; do
  reply_code=$(curl --config /home/user/.credentials.txt -Is $each_url | grep HTTP | cut -d' ' -f2)

  if [[ $reply_code != 200 ]]; then
    $(echo "See user cron /home/user/monitor.sh (ticket XXXX)." | mail -s "$each_url DOWN!"  me@youremail.com)
  fi
done

'--config' would have this value:

-u username:password