Question

1

Bare-metal mode for Ubuntu

rated 0 times [ 1] [ 0] / answers: 1 / hits: 1811 / 2 Years ago, thu, march 17, 2022, 11:14:51

I'm interested to benchmark a console-mode application, and would like to reduce to a minimum any interferences from other processes in the system.

Is there an easy way to boot into Ubuntu 12.04 in a "bare-metal" mode ? I'm still interested in casually booting a "desktop" version of Ubuntu (so will prefer to avoid permanent changes), and would like to avoid installing a separate Ubuntu-server version.

My use-case is the following -

Application is single-thread and console-mode only.

Test-box has 12GB of memory.

I ssh into the test-box.

Seems I can skip at least Unity, X-server and their dependents.

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polcomposte

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4 Years ago

answered 2 Years ago elopingapo · Accepted Answer

As long as you can trust yourself to not mess things up while logged in as root, the best way to get a minimal system with networking and SSH is:

Boot into recovery mode from Grub (hold Shift down when booting to get the menu)

Enable networking (which will also remount your partitions in normal read/write mode)

Drop to a root shell (aka single-user mode):

Do a service ssh start to enable SSH and you're good to go!

Note: you can always give your benchmark program realtime CPU and I/O priority using nice and ionice; e.g. maxing out both would be:
nice --20 ionice -c 1 /path/to/program