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64/32 bit operation

For help or questions about 64-bit version of MEPIS, this is the forum to use.
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Gordon Cooper
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64/32 bit operation

#1 Post by Gordon Cooper » Sun Jul 16, 2017 4:42 pm

Richard, a regular contributor to this forum is currently off-line because of a reticulation failure, with an unknown date of restoration. He and I have an intermittent and limited email connection that requires him to travel to a friend with wifi. Richard has asked this question to be posted.


Forum Question:
What do I need to download to run 32bit programs on 64bit? I use x32 netbook when visiting. Took snapshot and installed on 64bit desktop but x32 LibO, Slimjet won't run. Appreciate if you would post and I'll look for answers in a few days.
The problem is that the desktop is offline and need to do like many years ago in rpm-hell, install and then search for dependencies.

I answered:
To the best of my knowledge, 32 bit programs will run on 64, but not the other way around.

Richard replied: Thanks, still here. That's what I'd thought also, but they don't start. I remember a coment that there is a library that must be installed.

It seems to me the problem is that LibO was installed on 32 bit, snapshot was taken on same. I have installed and run 32 bit OS and apps on 64bit
desktop for years but this seems to be because I'm not online to pick up the 32bit lib dependencia for the 64bit OS?
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BitJam
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Re: 64/32 bit operation

#2 Post by BitJam » Sun Jul 16, 2017 5:18 pm

I am not clear on what took snapshot and installed on 64bit desktop means.

If you downloaded one or two 32-programs that you want to run on 64-bit, instructions are here Debian Multiarch HOWTO

If you made a snapshot iso of a 32-bit system and want to run programs in from a 64-bit system then there are different instructions.
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Adrian
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Re: 64/32 bit operation

#3 Post by Adrian » Sun Jul 16, 2017 5:23 pm

Why not run 64bit LibreOffice?
I use x32 netbook when visiting.
Than that won't run the 64bit OS. I'm a bit confused.

To install stuff offline is a bit of a pain, nowadays you can install 32 bit apps like this "sudo apt-get install programname:i386" that will download all the 32bit dependencies for the program. There's probably a apt-get voodoo that you can do to get a list of dependencies and then download them on another networked machine, but again, why install 32 LibreOffice and all its dependencies if you run a 64bit OS?

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Gordon Cooper
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Re: 64/32 bit operation

#4 Post by Gordon Cooper » Sun Jul 16, 2017 6:10 pm

Have relayed those replies back to Richard - he says:
"Due to theft of telephone cables in the subdivision, I have no telephone or
so-called broad band service. I have a 64 bit desktop but only laptops are
32 bit."

As I understand things, his friend is some distance away and daily visits are impossible.
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Re: 64/32 bit operation

#5 Post by Richard » Sun Jul 16, 2017 6:27 pm

Thanks for the tip about Muliarch. Downloaded to study and plan.

Problem: No telephone or internet access due to theft of telco cables in neighborhood since a week ago.
Months to replace.

Equipment: 64 bit desktop and 32 bit netbook both with MX 16.1.

Travel to friends to update 32 bit netbook online. After updating via USBs to x64 desktop,
I decided to make a snapshot of x32 OS on x32 netbook, which I then installed on x64 desktop.

However, upon executing the x32 snapshot installed on x64 desktop, discovered that major 32 bit apps
would not execute due to lack of libraries.

I plan to disconnect the x64 desktop and connect the 32 bit netbook to monitor, printer,
keyboard to print for business then
disconnect and take portable back and forth to internet access.

I will study the Multiarch possiblities for later this week to download required libraries
to allow x64 desktop to execute x32 apps when running the x32 snapshot on the x64.
which is just and exercise in futiity. it seems. just to avoid using the x32 netbook as daily ride.
But I did it in the past, can do it again until internet access is restored.

Thanks for the questions. I'll be back a couple or three days.

Regards.
MX18b1: Lenovo T430: Intel Ivy Bridge i5-3320M, 8GB RAM, 4.19.0-1-amd64, 119 GB SSD
MX18b1: Eee&AA1 NBs: Dual Core Atom N270, 1GB RAM, 4.19.0-1-686, 150 GB HDD
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Re: 64/32 bit operation

#6 Post by Gordon Cooper » Sun Jul 16, 2017 7:24 pm

Good to see you with access here again Richard. I will back out of the thread unless you need any more relays.
Gordon.
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BitJam
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Re: 64/32 bit operation

#7 Post by BitJam » Sun Jul 16, 2017 10:13 pm

Richard wrote:I decided to make a snapshot of x32 OS on x32 netbook, which I then installed on x64 desktop.

However, upon executing the x32 snapshot installed on x64 desktop, discovered that major 32 bit apps would not execute due to lack of libraries.
You needed to make a live-usb or live-dvd from the snapshot before you installed, right? Do the major apps work correctly on the live system? Was this an MX system you took a snapshot of? Was mx-snapshot used to make the snapshot? If you didn't go the route of MX system --> mx-snapshot --> iso file --> MX live system --> install --> MX system then the details of what you did may be crucial for figuring out what is wrong because the problem most likely occurred in one of these steps.

A 64-bit cpu that runs MX should be able to work as a 32-bit cpu perfectly. Nothing extra is needed to get a 32-bit OS to run on a 64-bit cpu. The problem lies elsewhere. Maybe the libraries were missing from the original system or maybe the snapshot program had a major failure or maybe the wrong kernel and initrd were given to the bootloader when you installed. None of these sound very likely but they are all more likely than a library problem due to a 64-bit cpu running in 32-bit mode (assuming you did a proper install).

Also, I know what SlimJet is but I don't know what libO is.
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Re: 64/32 bit operation

#8 Post by Adrian » Sun Jul 16, 2017 10:54 pm

First of all, what do you mean by "snapshot" did you copy files from one system to another?

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Re: 64/32 bit operation

#9 Post by Gordon Cooper » Mon Jul 17, 2017 12:07 am

BitJam asked "Also, I know what SlimJet is but I don't know what libO is."

Think he means Libre Office, will be using it in the manual translation project.
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Re: 64/32 bit operation

#10 Post by Richard » Wed Jul 19, 2017 11:39 pm

Thanks Bitjam/Adrian/Gordon.

Apologies for being so cryptic. Shortage of time and internet connection. Lost internet about 7 days ago due to theft of telco copper cables in subdivision. They bring a good price in Columbia I'm told.

I am running MX-16-i386 on netbook which I take to a friend's house who has wifi. Update things, email, etc.
Thinking to run the same version on both to make rsync simpler, I made snapshot of system on above netbook to then install on my x64 desktop with MC-16.1-x64, but into a separate partition. The snapshot works fine but as reported some major 32bit apps would not execute on the installed 32bit MX snapshot due to missing multiarch libraries and no internet to get them.

Upshot is that I will take the x64 box to the wifi connection Friday and install all needed on the main MX16.1-x64 & the installed MX16.0-i386 snapshot both on the 64bit desktop. Then just need to polish my rsync foo.

Thanks to all for the suggestions. The multiarch libs and no internet seems to have been the biggest problem. That and having to drive back and forth for dependencies. :)

I added a data plan for cell phone so now have email, whatsapp and browser. Between wife and I, we used about 25% of it the first day. Old habits are hard to break. :)

Again, thanks to all of you for your time, suggestions and thoughts.

Regards, Richard.
MX18b1: Lenovo T430: Intel Ivy Bridge i5-3320M, 8GB RAM, 4.19.0-1-amd64, 119 GB SSD
MX18b1: Eee&AA1 NBs: Dual Core Atom N270, 1GB RAM, 4.19.0-1-686, 150 GB HDD
DoubleCmd/Thunar, LibO613, Dropbox, Vivaldi/Firefox, CherryTree, Vbox. LinuxCounter #208633

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