Prereq:
  * A ftp account
  * Create a local directory you want to synchronize/backup
  * Create a directory on the ftp server you want to upload the content to

Tools:
<code>
sudo apt-get install fsniper lftp
</code>

Script:
<file>
#!/bin/bash

trap "rm /tmp/ftpsync.lock" SIGINT SIGTERM

if [ -e /tmp/ftpsync.lock ]
then
  echo "ftpsync already running.."
  exit 2
else
  touch /tmp/ftpsync.lock
  lftp example.com -u ftpuser,ftpuserpass << EOF 
lcd /home/tdd/FtpSync 
cd FtpSync
mirror -R -e
quit
EOF
  rm /tmp/ftpsync.lock
  exit 0
fi

</file>

fsniper configuration file (~/.config/fsniper/config) :
<file>
delay_time = 60 
delay_repeats = 0

watch {
  /home/tdd/FtpSync {
    recurse = true
    * {
      handler = /home/tdd/ftpsync.sh
    }
  }
}
</file>

Getting going:
First time running to get a feeling on how it works out, e.g. fixing any errors
<code>
fsniper --log-to-stdout
</code>

When things work:
<code>
fsniper --daemon
</code>

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Source: http://www.seiichiro0185.org/doku.php/blog:automatic_backup_to_ftp_with_fsniper_and_lftp