Hello,
I installed Ubuntu Mate 15.10 on a mini-pc with an i5-5287u processor with 8GB RAM. It went well. However, it looks like I installed the 32 bit version instead of the 64 bit. Don’t know how that happened.
How can I find out for sure which version I installed? If I really do have the 32 bit, how can I change it to the 64 bit?
Thanks
Paul
Open a terminal and enter
inxi -F
To upgrade from 32 to 64bit, you must reinstall.
More info in terminal with code
man inxi
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To confirm the architecture, type the following into a terminal and press the Enter key
uname -i
You will find a clean install a LOT less problematic than trying to “upgrade” your 32 bit installation.
On the other hand, what you requested is, somewhat remotely, possible. There is a guide for Debian based systems but this really is for professional-level system administrators and self flagellating narcissists.
http://users.digitalkingdom.org/~rlpowell/hobbies/debian_arch_up/index.html
However, if you are not one of them, it will absolutely definitely end badly. Consequently, I strongly recommend doing a re-install. I would certainly do a re-install if it was me and I am a confident Linux user of 8 years.
edit to add:
Actually scratch the above post. I have just thoroughly read the above “guide” and even the author tells you not to do it!
For all practical purposes, it’s impossible.
Re-install.
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+1 to reinstalling, sorry about that. The names are a bit confusing as discussed in a related thread:
I did the uname -i and I definitely have the 32 bit version. Looks like I downloaded the wrong file. Got confused by how the files were names. I’ll re-install.
Appreciate the responses.
Paul
I almost did the same thing, although it wasn’t so much as installing the wrong iso by accident; it’s the WORDING of the name files!
On the Ubuntu Mate iso download page, it specifically says this:
“64-bit PC (AMD64) desktop image
Choose this to take full advantage of computers based on the AMD64 or EM64T architecture (e.g., Athlon64, Opteron, EM64T Xeon, Core 2). If you have a non-64-bit processor made by AMD, or if you need full support for 32-bit code, use the i386 images instead.”
So from my perspective, I thought it was saying that there is ONLY a 64 bit version for AMD chipped-computers! I don’t know those other names (Athlon, Opteron, etc.) If the wording said “for intel 64 and AMD 64” then I would most DEFINITELY have downloaded the right iso!
So I suggest to the web page authors for Ubuntu Mate to reword that.
The wording had been changed already - it was me who submitted the changes, which was reviewed and applied. For some reason, I missed out 14.04 Trusty 
. The simpler wording is present for 15.04 Vivid, 15.10 Wily (currently used for the download button) and 16.04 Xenial (currently in Alpha).
Just awaiting for the maintainer to merge the change for Trusty, then these confusions should be cleared.
I’d personally like to present the download page with a make-over one day.
Yes, I see how Wily is now more understandable. Just wish it had happened earlier, because now I have to do a MIGRATE to a partition and then delete my 32 bit version after moving some directories. Oh well…at least I got room for the new partition! :\