When your question involves conversions to/from or idiosyncrasies of running on a CPU that uses 64-bit addresses.

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43
votes
2answers
29k 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 ...
44
votes
2answers
53k 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 ...
12
votes
4answers
8k views

32-bit, 64-bit CPU op-mode on Linux

I'm confused. Running Fedora Linux, lscpu yields: Architecture: i686 CPU op-mode(s): 32-bit, 64-bit ... But when I try to install a 64-bit program (Chrome) I get error like: ...
17
votes
4answers
20k 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?
4
votes
1answer
18k views

Running a 32-bit application in Debian Wheezy 64 bits: Missing libraries

I want to play the game Aquaria in a Debian Wheezy 64 bits. The installation went ok, but when trying to play the game I get these errors: ALSA lib conf.c:3314:(snd_config_hooks_call) Cannot open ...
5
votes
4answers
2k views

Should I install 32 or 64 bit?

I'm going to be installing linux on my 64bit netbook. Last time I checked I was advised that for personal computers (not servers) it is best to install the 32bit version. I believe the reasoning was ...
24
votes
7answers
15k views

How to convert a 32-bit (x86) Debian-based system to 64-bit

I have a 32-bit system which runs on a 64-bit processor. How do I convert it to be all-64-bit, without re-installing? I have seen somewhere that it is doable as a result of the new Multiarch framework....
7
votes
3answers
1k views

Why does the i386 version of software get installed on an x86_64 system?

Why does the i386 version of most software get installed, along with the x86_64 version, on a CentOS 64-bit system? # yum install php-xml Loaded plugins: fastestmirror Loading mirror speeds from ...
1
vote
3answers
875 views

Why is it better to use a 64bit OS?

Speed/Security? Why should we choose to use 64 bit instead of 32 bit?
35
votes
2answers
7k views

Why are 64-bit distros often called 'amd64'?

I am downloading an ISO image of Lubuntu; they have two versions: 32 and 64. But why do they call the 64 version amd64 since they say that it works for Intel also?
19
votes
2answers
31k views

is my linux ARM 32 or 64 bit?

under an intel I know I can look at the outcome of uname -m to know if my OS is 32 or 64 bit, but under ARM this gives: armv7l I deduced from file /usr/bin/ls that I'm on a 32-bit OS, but how ...
4
votes
1answer
760 views

The structure of /proc/kcore on 64-bit machine and relation to physical memory

Let me preface this question by saying that I've found a lot of answers for questions similar to my question but for 32-bit machines. However, I can't find anything for 64-bit machines. Please no ...
3
votes
3answers
2k views

How to determine bitness of hardware and OS?

Output of uname -a on my RHEL 5.4 machine is: Linux <machine name> 2.6.18-164.el5 #1 SMP Tue Aug 18 15:51:48 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux Does it mean that hardware is 64 bit (...
9
votes
1answer
3k views

How can I determine if my processor is 64 or 32 bit? [duplicate]

Possible Duplicate: How do I know that my CPU supports 64bit operating systems under Linux? I am running Debian Squeeze, how can I determine whether my processor is 64 or 32-bit? I'm thinking ...
8
votes
3answers
12k views

64-bit Linux doesn't recognize my RAM between 3 and 32 GB

My problems were caused by a faulty memory module and quite possibly a broken kernel binary. I just now booted my PC with basically brand new hardware. I've been running Debian 6.0 AMD64 before, ...
6
votes
1answer
11k views

Run 64 bit app on 32 bit system (Ubuntu)

All the questions I've seen refer to running a 32 bit app in a 64 bit system. I'm running Ubuntu 12.04 32 bit (actually elementary OS Luna, which is based on it) and I'm trying to run a 64 bit app ...
10
votes
2answers
4k 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.
9
votes
1answer
2k views

User Kernel split in 64bit Linux

What is the default user/kernel split in the 64bit linux ? I read Documentation/x86_64/mm.txt (which someone pointed out), but I could not make out. Can somebody provide a direct answer (something ...
7
votes
2answers
5k views

64-bit kernel, but all 32-bit ELF executable running processes, how is this?

The output from uname: root@debian:~ # uname -a Linux 5asnb 2.6.32-5-amd64 #1 SMP Mon Jun 13 05:49:32 UTC 2011 x86_64 GNU/Linux However the /sbin/init executable shows up as 32-bit: root@debian:~ #...
4
votes
1answer
1k views

When executable files aren't [duplicate]

Possible Duplicate: Can't execute some binaries in chroot environment (zsh: Not found) Today I ran into something that has me stumped. A co-worker is working with a specific pre-compiled ...
4
votes
4answers
3k 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 ...
2
votes
3answers
446 views

Will a 32-bit linux OS work on modern desktops that are compatible with 64-bit?

I'm building a minimal "appliance" via SuseStudio (OpenSuse 13.x) - nothing fancy... just running some emulators on it. I'd like the OS to be compatible with as many workstations as possible so I'm ...
1
vote
1answer
310 views

32-bit on 64-bit: memory usage for multiple processes

I'm working on a Linux hosting solution for game server software, however the software in question is 32-bit and I'd be running 64-bit on the host. Now, I know I can run 32-bit apps on a 64-bit host ...
1
vote
1answer
1k views

Debian unstable: ia32-libs can not be used

After an dist-upgrade within Debian unstable (amd64) I can not use 32 bit programs anymore, because ia32-libs is not possible to install: # apt-get install ia32-libs Reading package lists... Done ...
1
vote
2answers
334 views

Virtualbox 64bit image on 64bit computer without virtualization support

I have a 64 bit image for VirtualBox (.vmdk file), and I don't have a 32 bit version. My computer doesn't support hardware virtualization. Logically VirtualBox says: This kernel requires an x86-...