Backing up data on Linux and Unix is a beautiful thing. It's beauti
everything that you ever need is at the command line and can be eas
and put in cron jobs.

On my systems I basically use two things; tar and rsync. Sometimes 
whole disc clones using Clonezilla.  Clonezilla is a live CD distro
self explanitory when you run it.  Just make sure your destination 
big or bigger than the source disc.  Clonezilla takes care of every
for you, it even backs up NTFS partitions.  I don't see the need to
further.  There is plenty of documentation about it out there if yo
a disc cloning program before.

Anyway, below I put some files about using tar and rsync.  I'll add
content in the future if need be. 
Using tar to backup data.
Using rsync to backup data.