Hello and Welcome to LinuxQuestions,
It all depends on what you want to backup. Do you want to backup whole systems or just user files and configurations? Need to backup what packages are installed and so on?
Depending on your needs, for files you can go with the solution offered by quanta, or write your own script to copy files. You'll need samba software (smbclient) to connect to Windows shares.
If you want to make professional backups then go with a dedicated solution like
Amanda or
Bacula. There are lots of backup solutions available, just do a Google Search and you'll be amazed.
Have fun with Linux.
Kind regards,
Eric