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Can i run ubuntu server on pentium 3 with 386mb of ram, as i need a basic file server to use at home. I have 3 computers and want to share files using a server on ubuntu, but i need to know what the minimum specs for it are.

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I ran Debian as a fileserver on a Linksys NSLU2 device (266Mhz cpu, 32Mb ram) with 1.5Tb USB disk space for over a year with no problem. If you're only going to use it as a fileserver, I'd recommend installing without any graphical interface and just using the command line. –  StarNamer Sep 19 '12 at 21:56
    
It will run on your server, but performance of the server will be a completely different story, as well as energy efficiency. –  LiveWireBT Sep 20 '12 at 0:42
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2 Answers 2

Yes you can!

Ubuntu Server (CLI) minimum requirement.

300 MHz x86 processor
128 MiB of system memory (RAM)
1 GB of disk space
Graphics card and monitor capable of 640x480

See also Ubuntu Server Guide.

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Server 12.04 will run on a Pentium III but will probably require a non-PAE kernel

As penreturn noted, your system is within the minimum specs for Server 12.04. But, note that 12.04 uses a PAE kernel by default which may not work on older systems, including yours.

To install Server 12.04 then, instead of using the i386 Server ISO, consider using the alternate i386 versions of the Xubuntu ISO. This is a text installer like the server, but includes the non-PAE kernel you will probably need. To install a CLI system, follow the steps and decline to install any "desktops".

Technical note: I know that the Pentium III CPU itself supports PAE, but the old system (motherboard) which contains the memory controller usually won't make this feature available.

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