Kismet can be started normally from the command line, and will run in a small ncurses-based wrapper which will show the most recent server output, and a redirect to the web-based interface.
Kismet can also be started as a service; typically in this usage you should also pass
--no-ncurses to prevent the ncurses wrapper from loading.
An example systemd script is in the
packaging/systemd/ directory of the Kismet source; if you are installing from source this can be copied to
/etc/systemd/system/kismet.service, and packages should automatically include this file.
When starting Kismet via systemd, you should install kismet as suidroot, and use
systemctl edit kismet.service to set the following:
[Service] user=your-unprivileged-user group=kismet