Reading Linux

Dec 05, 2007 17:14 # 45264

sid * has all the information you need...

Linux Virtualization

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Lately i've experimented a lot with User-Mode-Linux (UML). Right from setting up dummy network topologies , testing mailservers , test configurations for snort/iptables and other IDS's , trying out newer kernels ( sometimes older 2.4.x's), testing kernel patches ,testing scripts for automating distributed upgrades and the list goes on. In my opinion UML provides an excellent way to test / evaluate a lot of things without doing any harm to the base linux system but it does has its own limitations.

Xen seems to be very popular these days so im thinking to try it soon , i would surely like to know more about setting up Xen on a Ubuntu Feisty box.

Dec 07, 2007 03:44 # 45266

ginsterbusch *** wants to know...

Re: Linux Virtualization

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Lately i've experimented a lot with User-Mode-Linux (UML).

So UML is working with current Linux kernels again? Good to know then ;)
About one year ago I tried to get it runningm, too, but failed because of some totally out-of-date code base.

Nowadays, I prefer using QEMU plus its speed-up unit KQEMU. VMware Server is a nice virtual environment, too. But QEMU seems to be most promising - at least its one of the best command-line based virtual machine environments ;)

Have been running Win2K SP6 for a few months and didnt encounter any problems so far.

cu, w0lf.

beards are cool. every villain has one!

Dec 07, 2007 07:58 # 45267

sid * replies...

Re: Linux Virtualization

66% | 2

You're right !. Building UML for Linux 2.4.x can be a pain , you need to patch to your kernel-tree which may or may not be entirely successful. A LOT depends on uml-patch and linux kernel you picked up. I wrote a few things on my blog about it , things i faced when i had to compile a 2.4 uml kernel for an odd reason.

But i never faced any problems with newer Linux 2.6.x , there's no need to patch ; arch uml has now become a part of the linux kernel-tree. In most of the cases the kernel gets complied without throwing any errors although it largely depends on configuration you're trying to build. Setting up networking with the host linux system , setting up networking between multiple uml virtual machines or updating your rootfs ( debian , fedora , gentoo ) isn't a problem either. Its a lot of fun !.

I've never tried VMware , is there a shareware version available ?. Would surely give QEMU a try on a Linux Box. If you have a few web links/tutorials to share that would be great.

Thanks for the reply !

Dec 07, 2007 20:29 # 45270

ginsterbusch *** replies...

Re: Linux Virtualization

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I've never tried VMware , is there a shareware version available ?

No, but something much better: AFAIK its a closed source version, but freely available (except you gotta register for a S/N, but thats also free) for anyone ;)

To be found over here: http://www.vmware.com/download/server/

cu, w0lf.

beards are cool. every villain has one!

Dec 07, 2007 23:17 # 45272

eljefe *** replies...

Re: Linux Virtualization

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Ubuntu used to have some nice .deb's for VMWare server, I can't find them anymore (must be an old repository somewhere).

I do like VMWare Server's management console, very nice and clean (and written in GTK+ so not ugly as shiat). I bring up the GUI because I use Ubuntu as my desktop environment and while I'm not scared of the console, do so enjoy having a function gui.

Fond memories

Dec 11, 2007 14:43 # 45285

sid * replies...

Re: Linux Virtualization

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To be found over here: http://www.vmware.com/download/server/

Thanks for the web link. I'm downloading vmware server as i'm writing this reply.

For now i'm not quite impressed with Xen as far as flexibility to try different kernels is concerned nor with the approach of installing a newer base kernel that supports Xen and running multiple vm's over it. BUT i gotta play a lot to find out more about Xen.

Jan 24, 2008 08:29 # 45399

ContingencyPlan * replies...

Re: Linux Virtualization

66% | 2

Another one to consider is VirtualBox, a freely available x86 VM. I'm using it on my current machine (7 years old - Athlon XP 2200+, 512 MB DDR 3000 RAM), and it runs Windows XP decently (though you still notice the slowdown). It has the nice feature of allowing you to mount a directory from Linux inside the Windows virtual install, letting you share / swap files back and forth that way. I must admit I haven't tried VMWare, though, and it wouldn't surprise me if they had the same kind of feature.

(I'm looking forward to upgrading; running a VM using the virtualization stuff on the new processors will be niiiice.)

I'll see your two cents, and raise you a dollar... :)

Jan 24, 2008 09:08 # 45400

ginsterbusch *** has all the information you need...

Re: Linux Virtualization

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A) VMware Server sure is a nice one.
b) KVM is the thing to try if you're upgrading ;)
c) QEMU does have this mount-feature you're talking about, too. After what I've tested, QEMU fits most of my needs. VMware comes right after that.

cu, w0lf.

beards are cool. every villain has one!

Feb 10, 2008 22:54 # 45435

majic *** replies...

Re: Linux Virtualization

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Don't forget the free vmware-player, I use it all the time.

Dec 11, 2007 11:40 # 45284

sid * replies...

Re: Linux Virtualization

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Just installed Xen on Ubuntu Feisty. Right now i'd just say its easier to setup as compared to UML.


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