I accidentally installed my system with a trailing \ in the fqdn.
I didn't notice until I went to install emacs, which then showed errors in
the exim install.  I prefer postfix, so installed it - which then failed on
postfix and ssl-cert installs.  At which point I noticed the hostname was wrong.


Boot method: USB
Image version: debian-12.5.0-amd64-netinst.iso
Date: Thu Aug  8 17:19:04 2024

Machine: Mac Mini
Partitions: <df -Tl will do; the raw partition table is preferred>
root@macdeb:~# df -Tl
Filesystem     Type     1K-blocks    Used Available Use% Mounted on
udev           devtmpfs   3978940       0   3978940   0% /dev
tmpfs          tmpfs       800512     868    799644   1% /run
/dev/sda3      ext4     862995256 4014580 815069252   1% /
tmpfs          tmpfs      4002548       0   4002548   0% /dev/shm
tmpfs          tmpfs         5120       0      5120   0% /run/lock
/dev/sda1      vfat        201609   29704    171905  15% /boot/efi
tmpfs          tmpfs       800508       0    800508   0% /run/user/1000


Base System Installation Checklist:
[O] = OK, [E] = Error (please elaborate below), [ ] = didn't try it

Initial boot:           [o]
Detect network card:    [o]
Configure network:      [o]
Detect media:           [o]
Load installer modules: [o]
Clock/timezone setup:   [o]
User/password setup:    [o]
Detect hard drives:     [o]
Partition hard drives:  [o]
Install base system:    [o]
Install tasks:          [o]
Install boot loader:    [o]
Overall install:        [o]

Comments/Problems:

This was a dumb mistake on my part, but a warning about it would have been appreciated.