Can a virtual machine file be converted to an iso image?

Question

linux

I was building gentoo on virtualbox. When I finished, I needed to convert my machine to an iso file (so that I could install it on a flash drive, etc.), but I ran into a problem, I don’t know how to convert the virtual machine file to iso. Is it possible to do this, or has all the effort been wasted?

Answer 1

to install on a USB flash drive, you do not need iso,
just copy the FS files to a USB flash drive and prescribe the bootloader

Answer 2

If your task is to migrate a virtual machine, then use this guide
https://askubuntu.com/questions/32499/migrate-from...
However, there is another option.
https://codebeer.ru/dd-cloning-disk-po-ssh/

dd if=/dev/sda | gzip | ssh [email protected] 'gzip -d | dd of=/dev/sda'