How To Install Ubuntu 12.04 On Non-PAE Capable Hardware
Physical Address Extension (PAE) is a feature to allow (32-bit) x86 processors to access a physical address space (including random access memory and memory mapped devices) larger than 4 gigabytes.
Ubuntu 12.04 (as well as Kubuntu 12.04) uses the PAE Linux kernel by default for 32bit ISOs so old computers that don't support PAE can't boot
the latest Ubuntu version. But there is a way to install Ubuntu 12.04 LTS Precise Pangolin on computers without PAE support: using the non-PAE netboot Minimal ISO
(there are also some alternatives, see below).
The non-PAE netboot mini ISO
lets you install the non-PAE kernel and the desktop environment you want: you can select to install Ubuntu Desktop (with Unity), Kubuntu Desktop and so on. One note though: since the minimal CD will download packages from online archives at installation time instead of providing them on the install CD itself, you need a working Internet connection during the installation
Install Ubuntu 12.04 LTS on non-PAE capable systems using the netboot minimal ISO
Download mini.iso from HERE
, write it on a CD or USB stick and boot from the ISO like with the regular Ubuntu ISO and select "Install":
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