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7
votes
2answers
3k views

How can I install a 64bit Linux virtual machine on a 32bit Linux?

I've got a computer (Intel core i5) with 32bit Linux installed (ubuntu 11.04) and I would like to install a 64bit Linux virtual machine on it so I can test 64bit command-line applications on it.
6
votes
2answers
283 views

Running 32 bit app on a 64 bit Linux machine

Are there any performance drawbacks (CPU, Memory or IO) when running a 32-bit application on a 64-bit Linux? My main concern is inefficient utilization of pointers and memory blocks.
8
votes
3answers
9k views

How do I know that my CPU supports 64bit operating systems under Linux?

How can I find out that my CPU supports 64bit operating systems under Linux, e.g.: Ubuntu, Fedora?
3
votes
3answers
574 views

Really light weight linux for VM no extensions

I need to host a ssh server on a x86-64 Debian squeeze machine with no VT-extensions :( I am using virtlib with qemu (set up and working). I have tried a number of things and non have been perfect, ...
27
votes
2answers
14k views

Getting “Not found” message when running a 32-bit binary on a 64-bit system

I have currently a strange problem on debian (wheezy/amd64). I have created a chroot to install a server (i can't give any more detail about it, sorry). Let's call its path /chr_path/. To make things ...
28
votes
2answers
21k views

How do I run 32-bit programs on a 64-bit Debian/Ubuntu?

I have a 64-bit (amd64 a.k.a. x86_64) Debian or Ubuntu installation. I need to run 32-bit (i386/i686) programs occasionally, or to compile programs for a 32-bit system. How can I do this with a ...
18
votes
1answer
5k views

How to tell if a running program is 64-bit in Linux?

In Mac OS X, I could use the Activity Monitor program to see if a running program/process is 64-bit. How do I do that in a Linux OS, regardless of flavour?
4
votes
1answer
2k views

Building 32-Bit on a 64-Bit system

I'm trying to build the PHP memcache extension (v2.2.6) for i386 (32bit) on my x86_64 Ubuntu 11.04. ./configure uses config.guess by default (which outputs x86_64-unknown-linux-gnu on my system) but ...
1
vote
2answers
538 views

Hardware to install 64-bit OS

If I search on Internet for minimum requirements to install a 64-bit operating system, Microsoft and allied forums recommend 4 GB RAM as the minimum criteria. On the other hand, when I look at Linux ...
3
votes
2answers
5k views

What is the difference between 32-bit PAE and 64-bit kernels?

I ask this only in regards to memory addressing. I know that a PAE kernel allows the OS to access more memory than a standard 32-bit kernel, however, what are the other implications? What specific ...
1
vote
1answer
2k views

Differences between Debian bigmem and amd64 kernels

Debian 6 has multiple Linux kernel packages, and I'm interested in two of them: linux-image-2.6.32-5-686-bigmem linux-image-2.6.32-5-amd64 Consider that: I'm not going to be running any ...
1
vote
1answer
1k views

What's the difference between 32 and 64 bit linux?

What exactly are the implications? Can a 32 bit linux run applications that are compiled as 64 bit? Or vice versa? I just got a new machine with an i5 processor, I installed a copy of Ubuntu 10.10 ...
5
votes
2answers
2k views

OpenBSD: 32 bit or 64 bit

I would like to use the 64 bit version of OpenBSD, but I'm not really sure how good it works. Are there any known problems? Is the 32 bit version more recommended for productive environment?
4
votes
3answers
2k views

How come I installed Ubuntu 64 bit on a Pentium 4 machine?

I have just tried booting the Ubuntu 10.10 64 bit live USB on this machine and to my amazement everything works fine. I even installed the system, after which I checked with uname -a and the result is ...
3
votes
2answers
419 views

Linux distro installation on 64 bit processor

I am trying to install Ubuntu/Fedora 64 bit versions on my machine and they shout back saying my CPU does not support x86_64 bit architecture and forces me to use i686 versions. I am currently ...
14
votes
4answers
785 views

How was the shift to 64 bits handled on Linux

How was the transition to 64 bits handled on Linux/Unix? The Windows world still seems to have issues with it and I'm curious how it was handled in the *nix world.