Ubuntu Unleashed 2019 Edition: Covering 18.04, 18.10, 19.04

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use. If everyone will be using the same program on each client, you do not
need as much memory and processor speed as you would need if everyone
were doing different things at the same time. You can easily run LTSP on a
repurposed old machine you have sitting around with 512MB RAM, a 1GHz
Celeron processor, and a decent working hard drive, and it will work, but we
don’t really recommend that if you are going to have more than a couple of
clients doing anything beyond simple and identical tasks.


Our minimum recommendation is the same as the current recommendation
for a minimum Ubuntu desktop installation. At least a 100Mbps Ethernet card
or better is vital. Ideally, you would bump each category up to the highest
level you can afford and expect better performance as a result. Our minimum-
if-you-want-a-great-experience recommendation is a current-issue fast-as-
you-can-afford multicore 64-bit processor, 4GB RAM, at least two fast hard
drives in a RAID array for performance and data backup, and at least one and
perhaps two Gigabit Ethernet cards.


Most of the time when you use LTSP, you want the network to be connected
to the Internet. There are two main ways to do this. Figure 38.2 shows the
network with an Internet connection via an Internet router connected to the
switch/hub. This is a common method and works well.


FIGURE 38.2 A typical LTSP install with an Internet connection via an
Internet router.


Another common method is to connect the server directly to the Internet
router, as in Figure 38.3. This has the benefit of enabling you to easily

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