backup tools
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afio

amanda

Arkeia

backup2l (http://backup2l.sourceforge.net/)

backuppc (http://backuppc.sourceforge.net/)

bacula
 http://www.bacula.org/

BRU (http://www.tolisgroup.com).

sysutils/cdbkup

cpio

DAR (http://dar.linux.free.fr/)
backing up a single system to DVD/RW.
kdar (works with gnome)

Dirvish
http://www.dirvish.com/
"fast, disk based, rotating network backup system"
"maintain a set of complete images of your filesystems with unattended
creation and expiration. A dirvish backup vault is like a time
machine for your data."

dump/restore

G4U

gmirror

lonetar

Mondo/Mindi
http://www.mondorescue.org/

networker (solaris?)

pax

pdumpfs

rdiff-backup

rsync

rsnapshot

tar / gnu tar

TSM
IBM Tivoli Storage Manager
http://www-3.ibm.com/software/tivoli/products/storage-mgr/
Linux binary at
ftp://ftp.software.ibm.com/storage/tivoli-storage-management/maintenance/client/v5r2/Linux/Linux86/v522/