Re: Running another OS under OpenBSD
On Thu, Dec 11, 2008 at 09:04:48PM +0100, Toni Mueller wrote: > > On Thu, Dec 11, 2008 at 10:30:50AM -0800, Jeff_1981 wrote: > > > Please can you indicate me how to run Windows or Linux under OpenBSD ? > > > Under Linux for example there is possibility to virtualize another OS. > > > If the other OS is hacked from the web does it compromizes the security of > > > OpenBSD ? > > this is generally possible. If you kept an eye on the virtualization > methods under Linux, you will have encountered several cases where it > was possible for virtual machines to break out of their compartment, > and invade the host or other guest systems. Search eg. for "blue pill" > if you want more details. As a footnote: Rafal Wojtczuk "recently" (October, 2008) published an interesting paper demonstrating an escape from a Xen guest to dom0 on i386 Fedora 8.[1] - Jukka. [1] http://invisiblethingslab.com/pub/xenfb-adventures-10.pdf
Re: Backup strategies
On Sat, Jan 31, 2009 at 01:36:49AM -0500, Predrag Punosevac wrote: > I am seeking advice about the backup strategies and possible use > of CVS to accomplish this task. > > I happen to use 4-5 different computer on the daily basis for my work. > I use my laptop, desktop, and a file server at work as well as my personal > desktop and my wife's laptop at home. > It is of paramount importance for me that my files are in sync on all > 5 computers > for two reasons. I want to start working always with the latest and > most up to date version of files regardless of the computer which I am using. > Secondly, if a HDD dies on one or even three-four computers at the same moment > of time I will still have backup copy to recover the work. I have been using a comparable setup for years. Using a version control system for the task is doable, but in my opinion somewhat cumbersome to use in daily basis, especially if the data contains large files. While there are special tools like unison, I have settled down with rsync and ssh. Easy to use and maintain, but not a replacement for backups. - Jukka.
Re: controlling the fan?
On Wed, Jun 10, 2009 at 11:53:39AM +0200, Jan Stary wrote: > it could be quiter. Is there a way to control the fan RPM from the OS? > (Unsurprisingly, hw.sensors.adt0.fan0 is readonly.) Some laptops provide means to control a fan via somewhat primitive ACPI-interface (a.k.a. PNP0C0B). If you are into kernel development, writing such a driver shouldn't take more than a hour or so. You have to probably examine the DSDT to find out if this is possible; see acpidump(8) for details. - Jukka.
Re: Is NV supposed to be SLOW?
> > Yes. NVIDIA refuses to make a useful open source driver. It is barely > > functional and it generally sucks really really bad. Stay away from > > NVIDIA when doing open source. > > I'm going to express a very small and highly qualified exception to this > comment... I concur: clearly things are not as bad as some have expressed (noting also that the current situation is bad, regardless of the card). As for Nvidia as a vendor, nothing to add. > I have found that OLD nvidia cards (16M-ish ones) work pretty darned > well with the base nv driver for OpenBSD. I'd say "just worked", other > than in a multi-headed config, it goes a bit stupid and tried to run the > monitors at 2048x1600 or similar absurd resolution (which actually, one > of my monitors DID come up in...shocking the heck out of me and probably > the monitor, too). I run 2048x1536 + 1600x1200 -xinerama setup here with two low-end GeForce 6200 pci-e cards and nv. Works reasonably well. > Granted, my usage is fairly basic. The only multi-media anything I have > on this system is xmms. When flipping rapidly between screens, I see Ditto: I run Fluxbox and seldom use any GUI-applications at all. I haven't tried any video, let alone any 3d. Works reasonably well under these settings. - Jukka.
