application in it....then i want that live os as installable os setup as image so that i don't have to configure again and again after a fresh install on different devices.
can anyone help?
You can use something like ansible or a distro like nixos. A whole image for that might not be a good solution
What kind of application?
Kickstart might be useful here https://help.ubuntu.com/community/KickstartCompatibility
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