Package: adduser Version: 3.121 Adduser's postinst script creates /etc/adduser.conf.dpkg-save file on debootstrap's root filesystem, that is, even if /etc/adduser.conf doesn't exist prior to package installation.
$ sudo debootstrap sid debian-root/ http://deb.debian.org/debian/ ... $ sudo chroot debian-root/ /bin/bash # dpkg -s adduser|grep Version: Version: 3.121 # ls -l /etc/adduser.conf* -rw-r--r-- 1 root root 3185 Jun 8 09:31 /etc/adduser.conf -rw-r--r-- 1 root root 3171 Jun 8 09:31 /etc/adduser.conf.dpkg-save # diff -u /etc/adduser.conf* --- /etc/adduser.conf 2022-06-08 09:31:37.278453722 +0000 +++ /etc/adduser.conf.dpkg-save 2022-06-08 09:31:37.278453722 +0000 @@ -86,4 +86,3 @@ # check user and group names also against this regular expression. #NAME_REGEX="^[a-z][-a-z0-9_]*$" -DIR_MODE=0755 The .dpkg-save file shouldn't be present on debootstrapped system. I believe this is caused by commit 9cef72b09[1]. First reported in Ubuntu[2]. [1] https://salsa.debian.org/debian/adduser/-/commit/9cef72b09 [2] https://bugs.launchpad.net/ubuntu/+source/adduser/+bug/1977710
