"As cloud backups are becoming more popular, Linux backup
vendors such as Zmanda are adding Linux cloud backup to their
repertoires. In Zmanda's case, its Zmanda Enterprise backup product
allows backing up to Amazon's S3 (Simple Storage Service) cloud
from Linux devices.
"Linux data backup for virtual machines
"Similarly, Linux data backup products are offering support for
virtual machines. This is a capability that has really exploded in
the last couple of years as server virtualisation has taken off on
all kinds of servers, including Linux servers. Although virtualized
systems can be backed up using just about any backup system
(including shell scripts if you are so inclined), there are
specialized features of virtualized systems that respond best to
software designed for virtualized backup."