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Questions tagged [64-bit]

Questions about the 64-bit architecture, and how to get software (including 32-bit applications) working on it.

Bitwidth is a measurement of how much data (the word size) a processor can handle in a single operation. A 64-bit CPU architecture (also called amd64 and X86_64) allows for faster performance and better multitasking than 32-bit (also called i386 and X86). A 32-bit processor can only address 4Gb of memory, so further available RAM is used less efficiently (with the help of PAE), while a 64-bit processor is not limited in this way as it could theoretically address about 1Tb.

Processors in modern laptop and desktop machines are able to run in both 32-bit and 64-bit mode and all Ubuntu flavors are currently available in both bitwidths, but Canonical have announced plans to drop support for 32-bit architecture in 2018.

32-bit applications can be run on a 64-bit system quite easily, but the reverse is not the case.

Further information can be found in the Ubuntu help wiki

1981 questions
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Why does Ubuntu Download recommend 32-bit install?

Update for 13.10: 64-bit version is now the default and 32-bit is labelled "for machines with less than 2GB RAM" The Ubuntu desktop download screen has a pair of radio buttons you use to select whether you wish to download the 32-bit or 64-bit…
Warren Pena
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How can I check if my CPU is AMD64 compatible?

I'm downloading both versions of Ubuntu 12.04 at this moment. I'd like to install AMD64 on my portable, even though it's an Intel machine. Is there a website (or another way) where I can check compatibility? Acer Aspire 5745G-724G50Mnks, Intel i7…
GUI Junkie
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Is 64 bit Ubuntu stable for general use?

Are there still general problems using the Ubuntu 64bit version ? I heard that most of the programs do not work out of the box? Will I notice a significant speed-boost? Until now I have always used Ubuntu 32 bit.
jsterr
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How to install ia32-libs?

Today I updated from 13.04 to 13.10. Then sudo apt-get autoremove removed all 32bit packages. How to get them back? How do I install ia32-libs again? This is what I get if I try to install them back : output$ sudo apt-get install ia32-libs Reading…
BЈовић
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running a 64bit executable on a 64 ubuntu lucid

I have an ubuntu 10.04 64bit, and I'm trying to launch a 64 bit executable with no luck: ./lmrand1 -bash: ./lmrand1: No such file or directory ls -la lmrand1 -rwxr-xr-x 1 ysagon ysagon 191872 2011-09-05 18:13 lmrand1 file lmrand1 lmrand1: ELF…
Yann Sagon
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Is it possible to have 32 bit libraries installed on a 64 bit system?

I have the 32 bit shared libraries installed, yet I am still getting this error while trying to install pogoplug: ./pogoplugfs: error while loading shared libraries: libfuse.so.2: wrong ELF class: ELFCLASS64 Is there something else I need to do to…
Mat
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Should I install 64-bit Ubuntu if my hardware supports it?

I've just got my first 64-bit-capable laptop (previously I've only dealt with 64-bit on servers). Of course the first thing I am going to do is to format the hard drive and install Ubuntu instead of Vista, and the question is should I install 32-bit…
Ivan
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2 answers

Why is the 64bit 10.10 ISO labeled amd64.iso?

Possible Duplicate: My processor is 64-bit - does that mean I need the amd64 image? And should I be reluctant to try and install it on a laptop with an intel processor + 6G RAM? (Probably a silly question, I know because I don't NEED the 64 bit…
user2367
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What is the difference between amd64 and linux 64 versions?

i am using Ubuntu Ubuntu 14.04.2 LTS, in 64bit OS, i am about to install oracle instant client in my system, on checking this tutorial I saw 2 may be 3 linux versions 1 Oracle Database 10g Instant Client for Linux AMD64 (32-bit and 64-bit) 2 …
Mukund
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Does Ubuntu support 64 bit CPUs?

Am thinking of upgrading to a new laptop (64 bit) and would like to install Ubuntu 12.04 or newer. Are they compatible?
nero60
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Ubuntu 12.04 64-bit system freezes

Possible Duplicate: What should I do when Ubuntu freezes? Ubuntu 12.04 LTS system freezes completely, only way out is a hard reboot :( It's random, often while doing Shotwell, sometime Google Earth, few times even while ejecting a SD drive! I…
user78505
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Ubuntu x32 releases or ports?

I have read about the x32 port of Debian. Now, I wonder if Ubuntu has a x32 port or at least some x32 version of its packages since Ubuntu is based on Debian. It does have some libx32-* packages on the official repository. Can you have or build or…
user128712
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Ubuntu 13.10 x64 SteamCMD

I'm guessing that this question may of been asked before; however, I'm having trouble finding an answer. I'm currently reviewing dependencies for all the Game server scripts I have written (http://danielgibbs.co.uk/scripts). There has been a big…
dgibbs
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2 answers

Can I run a 64-bit OS on my Pentium 4 computer?

Late models of Pentium 4 can run 64-bit OS, as I understand. How to detect compatibility of my Pentium 4 processor with 64-bit OS? I have following output for sudo lshw -C processor *-cpu description: CPU product: Intel(R) Pentium(R) 4 CPU…
Andrey Shevchenko
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How can I tell if I have downloaded 64 bit?

I am completely new to Ubuntu and this forum. I've just gone through the process for a free download of Desktop LTS, for the purpose of establishing a MythTV set-up on my home. The MythTV instructions suggested using a 64 bit version of Ubuntu,…
Peter C
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