I just checked the Ubuntu livecd, it is in that repository. The description says "high-performance, enterprise-grade system for backing up PCs". PCLOS is mostly average home user software, basically, sort of..., so I suppose an average person doesn't have a home network with a backup server, so I suppose it's not one of their priorities to get it in there. Maybe someone could request it at the forum, if it turns out to be good, they might add it (I don't have an account there at the moment). I backup stuff manually too, but I think it would be handy to have automatic backups. PCL has some backup stuff in the control center, not for this type of setup either, but I've never looked at that either....

The rest of the description from Ubuntu. Probably a duplicate of what can be found on the website.
"BackupPC is disk based and not tape based. This particularity allows
features not found in any other backup solution:
* Clever pooling scheme minimizes disk storage and disk I/O.
Identical files across multiple backups of the same or different PC are
stored only once (using hard links), resulting in substantial savings
in disk storage and disk writes.
* Optional compression provides additional reductions in storage.
CPU impact of compression is low since only new files (those not already
in the pool) need to be compressed.
* A powerful http/cgi user interface allows administrators to view log files,
configuration, current status and allows users to initiate and cancel
backups and browse and restore files from backups very quickly.
* No client-side software is needed. On WinXX the smb protocol is used.
On linux or unix clients, rsync or tar (over ssh/rsh/nfs) can be used
* Flexible restore options. Single files can be downloaded from any backup
directly from the CGI interface. Zip or Tar archives for selected files
or directories can also be downloaded from the CGI interface.
* BackupPC supports mobile environments where laptops are only intermittently
connected to the network and have dynamic IP addresses (DHCP).
* Flexible configuration parameters allow multiple backups to be performed
in parallel.
* and more to discover in the manual..."