Unfortunately the standard Ubuntu ISO requires an internet connection when installing on devices with a 32-bit boot loader otherwise the following error is encountered:
The 'grub-efi-ia32' package failed to install into /target/. Without the GRUB boot loader, the installed system will not boot.
My latest version of 'isorespin.sh' fixes this as it will now add the required GRUB packages allowing the installation to successfully complete.
Other Ubuntu ISOs including the Ubuntu flavours and distros based on Ubuntu (such as Linux Mint) etc. can also be respun and installed without the internet on 32-bit devices. Debian ISOs also work however YMMV with Debian based ISOs such as Kali etc.
