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Release manual for Debian Edu 5.0.0+edu0 Codename “Lenny” 2009/03/31

Posted by gsavix in Memorando.
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There are different ways of set up a Skolelinux solution. It can be installed on just one standalone PC or a regional wide solution at many schools operated centrally. This variety of configurations makes a huge difference on how things are set up regarding network components, servers and client machines.

Hardware requirements
the computers running Debian Edu / Skolelinux must have either i386, amd64 or powerpc processors.
On powerpc, the installation media will only boot on machines of the newworld sub-architecture, which are the systems from apple with a translucent case
thin client (LTSP) servers need two network cards when using the default network architecture:
eth0 connected to the main network (10.0.2.0/23)
eth1 (192.168.0.0/24) serving the thin-clients
disk space requirements depend on profiles used, but any disk larger than 10 GiB will be sufficient for installation, though you should have at least 20 GiB on the main server for production use. As usual, the bigger the better.
for the thin clients 32 MB RAM and 133 MHz is recommended as minimum. Swap is required
for workstations or standalone PCs 450 MHz, 256 MiB RAM and 8 GiB disc space are recommended minimum requirements
for diskless workstations (also known as stateless workstations, lowfat clients or half-thick clients) 256 MB RAM and 800 MHz or more is recommended minimum requirements. Swapping over the network is automatically enabled, the swap size is 32mb, if you need more you can tune this by editing /etc/ltsp/nbdswapd.conf on tjener to set the SIZE variable.
for Laptops 256 MB RAM and 450 MHz are minimum requirements

FIXME: add links to explainations of main-server and thinclient-server

Hardware known to work

A list of tested hardware is provided from http://wiki.debian.org/DebianEdu/Hardware/ . This list is not nearly complete

Requirements for a network setup
a router/gateway (IP 10.0.2.1) providing access to the internet (when using the default network architecture)

for the main server (10.0.2.2): this is the one single computer in the network which get’s the tjener-profile installed
workstation(s) and/or thin client (LTSP) server(s)
thin clients clients

Internet router

A router/gateway, connected to the internet on the external interface and running on the IP address 10.0.2.1 on the internal interface, is needed to connect to the internet.

The router should not run a DHCP server, it can run a DNS server, though this is not needed and will not be used. (If the router runs a DHCP server you must disable the DHCP server on the main server and you will loose some features and certain documented procedures will work differently. So better disable the DHCP server on the router.)

If you are looking for a i386 based solution (so that you can reuse an old PC), we recommend IPCop or floppyfw.

If you need something for an embedded router or accesspoint we recommend using OpenWRT, though of course you can also use the original firmware. Using the original firmware is easier, using OpenWRT gives you more choices and control. Check the OpenWRT webpages for a list of supported hardware.

It is possible to use a different network setup, this is the documented procedure to do this. If you are not forced to do this by an existing network infrastructure, we recommend against doing so and recommend you stay with the default network architecture.

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