If you are looking for a no cost and of open code tool to carry out security copies of your files, Amanda is one of the best options that exist at the moment.
Amanda's success is based on several reasons. Not only it is well documented and the installation id very easy: it also accounts with really practical and interesting functions for the system administrators.
With Amanda you can quickly configure a server to carry out security copies of several clients in net, in different storage devices. It can also write the copies simultaneously in tapes or disks. These can be saved in different locations like additional prevention.
Amanda is compatible with all the installed devices, and it doesn't use proprietors formats, so in the event of emergency the information can be recovered with any tool, although Amanda is no longer installed.
Amanda also uses encrypted for the transmission of clients data, and encrypted in the server of the security copies, guaranteeing that the transferred and stored information won't be able to be acceded with malicious intentions.