this post was submitted on 11 Jul 2025
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Careful there. You are only a half dozen abstraction layers away from reinventing NixOS.
As for your question, the best way is to put it in a file that is then read by the chroot script and delete later.
Preferably, put the variables into a temp file (e.g. using
mktemp
) and bind-mount that file somewhere into the chroot directory, so you can source it from within that environment.That way the critical information, like the passwords, at least only gets to live in volatile memory and won't stick around on the host system after the reboot. That limits the exposure somewhat.