This takes a username, password, url and optional time out

require 'net/http'
require 'net/https'
#Usage: username pass urlStr time_out
#

    urlStr = 'http://localhost:3000/cron/cron'
    username = "badname"
    pass = "badpass"
    time_out = 60

    if ARGV[3] != nil
     time_out = ARGV[3].to_i
    end

    if ARGV[2] != nil
     urlStr = ARGV[2]
    end
    
    if ARGV[1] != nil and ARGV[0] != nil
     username = ARGV[0]
     pass = ARGV[1]
    end
    puts urlStr + " user: "+username
    
    url = URI.parse(urlStr)
    use_ssl = url.scheme == 'https'
    req = Net::HTTP::Get.new url.path
    req.basic_auth username, pass
 
    http = Net::HTTP.new(url.host, url.port)
    http.read_timeout=time_out
    if use_ssl
      http.use_ssl = true
    end
    res = http.start { |web| 
      web.request(req) 
    }
    
    puts res.body

// remember to check that the path is correct.
// This is running on a dedicated server on TextDrive

#!/bin/sh

# This file will run a backup of your desired MySQL database and
# remove any backups older than 7 days.
#
# If youOd like to preserve backups for longer than a week, like say 
# 2 weeks, then set the '-mtime' value from '+7' to '+14'.
#

TIME_STAMP=`date "+%Y-%m-%d"`
echo "starting "$0" on" `date`
for db in db1 db2 db3
do
  DB_STAMP=${db}_${TIME_STAMP}
  echo ${DB_STAMP}
  /opt/csw/mysql5/bin/mysqldump --opt --skip-add-locks --user=username --password=password ${db} | gzip > /domains/backups/mysql/${DB_STAMP}.gz
  /opt/csw/bin/mutt -s "mysql  ${TIME_STAMP}"  -a /domains/backups/mysql/${DB_STAMP}.gz someuser@somedomain.com dev/null
done

cd /domains/backups/mysql/

/usr/bin/find *.gz -mtime +14 -exec rm {} \;
echo "finished "$0" on" `date`

This cron job will create a compressed backup of all the mysql databases under your account. The backup will be stored as "\daily-backup\Mon.gz" - and so forth, one for each day of the week. In this way you will have rotating backups going back seven days.

First, create the "daily-backup" folder under your home directory.

Go into the System - Cron Jobs section in webmin and paste this in as a new cron job (all one line)

/usr/local/bin/mysqldump --skip-opt -uUSERNAME -pPASSWORD --quote-names --complete-insert --extended-insert --quick --compact --lock-tables=false --skip-add-locks --all-databases | gzip > /home/USERNAME/daily-backup/sql-alldb-`date "+%a"`.gz 

Make sure to replace the USERNAME and PASSWORD with your own info.

You can set it up to run on any kind of daily schedule; I have it set to run daily at an early-morning time that I picked randomly.

/usr/local/bin/mysqldump --default-character-set=utf8 --user=username --password=password --quote-names --complete-insert --extended-insert --quick --compact --lock-tables=false --skip-add-locks --all-databases | gzip > /home/path/backup/`date "+%Y.%m.%d"`.gz

/usr/local/bin/ruby /home/rsimplicio/web/instiki/instiki.rb --daemon --port 8966 --storage /home/rsimplicio/web/instiki/storage/

To run a php-script as a regular job, you need just point to the php-cli instance with the path to your script:

/usr/local/bin/php /home/username/public_html/scripts/your_script.php

Thanks to Jason for original tip @ http://forum.textdrive.com/viewtopic.php?id=863