DRBL

Debian Lenny (5.0), Squeeze (6.0).
Ubuntu Lucid (10.04), Maverick (10.10), Natty (11.04), Oneiric (11.10), Precise (12.04), Quantal (12.10).
Fedora 14, 17,
CentOS 5, 6,
Scientific Linux 5.x, 6.x, RHEL 5.x, 6.x (Use drblsrv-offline)
OpenSuSE 11.2, 11.3.
Sorry but it will NOT work in other distributions or versions.

2. Basic hardware requirements

Check here for more details.

3. Setup the DRBL environment

I. Prepare the Linux server

II. Install the required packages on server

III. Setup the file system for the clients

IV. Prepare the clients

V. DRBL system administration

4. Upgrade

Backup the important files, such as those files in /etc/drbl and /etc/dhcpd.conf or /etc/dhcp3/dhcpd.conf, etc...
Run "drblsrv -u" to uninstall all the DRBL-related packages
Follow the step II, download the drbl main program, re-install and configure it again (i.e. "drblsrv -i" and "drblpush -i")

Sometimes if the versions are close, maybe you can try to upgrade the packages without re-install and re-configure it (i.e. just use apt-get update; apt-get upgrade or yum upgrade). However, this is not recommended, since some of the files will only be deployed to clients after drblsrv and drblpush are run.

5. Uninstall

To uninstall DRBL, run: "drblsrv -u", then follow it to uninstall DRBL and related packages.

6. Bug report

Excute "drbl-bug-report", then you will get a report (refer to this example). Please follow the the format to fill your description.
Mail that to DRBL user mailing list drbl-user _at_ lists sourceforge net (You have to subscribe to that mailing list), or post that in the DRBL forum.

7. References

this