Only to point that adduser is the recommended way to handle accounts in
maintainer scripts [1] and Debian Code Search reports 267 packages using
it [2], but dh_sysusers [3] seems to handle the same task on the
packages and works with useradd under the hood too.
[1] - https://wiki.debian.org/AccountHandlingInMaintainerScripts
[2] -
https://codesearch.debian.net/search?q=path%3Adebian%2F*postinst+adduser&literal=1&perpkg=1
[3] -
https://manpages.debian.org/testing/dh-sysuser/dh_sysuser.1.en.html
Regards,
Ricardo F.
