$ ls -lR /etc/hostname.*
/etc/hostname.run0 -> /etc/hostname.d/nwids/BlackHole.nwid

/etc/hostname.d:
nwids

/etc/hostname.d/nwids:
BlackHole.nwid
ZWLan.nwid

$ doas rcctl enable hotplugd
$ cat /etc/hotplug/attach
#!/bin/sh

DEVCLASS=$1
DEVNAME=$2
MOUNTROOT="/mnt"
DEBUG=1

case $DEVCLASS in
2)
        # disk devices
        disklabel=`/sbin/disklabel $DEVNAME 2>&1 | /usr/bin/sed -n '/^disk: /s/^disk: //p'`
[ $DEBUG == 1 ] && logger -i "hotplugd discovered DISKLABEL $disklabel"
        case $disklabel in
        "SCSI disk")
                slices=`/sbin/disklabel $DEVNAME 2>&1 | \
                sed -n '/^ *[abd-z]: /s/^ *\([abd-z]\):.*/\1/p'`
                for slice in ${slices}; do
[ $DEBUG == 1 ] && logger -i "hotplugd attaching SLICE $slice of DEVICE $DEVNAME"
                        [ ! -d $MOUNTROOT/$DEVNAME$slice ] && mkdir -p -m 1777 $MOUNTROOT/$DEVNAME$slice
                        mount /dev/$DEVNAME$slice $MOUNTROOT/$DEVNAME$slice
                done
                ;;
        esac
        ;;
3)
        # network devices; requires hostname.$DEVNAME
        sh /etc/netstart $DEVNAME
        ;;
esac
$ doas chmod 0755 /etc/hotplug/attach
$ doas rcctl restart hotplugd

$ doas pkg_add dunst

$ notify-send helloWorld

$ cat ~/.config/dunst/dunstrc 
[global]
font = Iosevka Term 11

# Allow a small subset of html markup:
#   <b>bold</b>
#   <i>italic</i>
#   <s>strikethrough</s>
#   <u>underline</u>
#
# For a complete reference see
# <http://developer.gnome.org/pango/stable/PangoMarkupFormat.html>.
# If markup is not allowed, those tags will be stripped out of the
# message.
allow_markup = yes
plain_text = no

# The format of the message.  Possible variables are:
#   %a  appname
#   %s  summary
#   %b  body
#   %i  iconname (including its path)
#   %I  iconname (without its path)
#   %p  progress value if set ([  0%] to [100%]) or nothing
# Markup is allowed
format = "<b>%s</b>\n%b"

# Sort messages by urgency.
sort = no

# Show how many messages are currently hidden (because of geometry).
indicate_hidden = yes

# Alignment of message text.
# Possible values are "left", "center" and "right".
alignment = center

# The frequency with wich text that is longer than the notification
# window allows bounces back and forth.
# This option conflicts with "word_wrap".
# Set to 0 to disable.
bounce_freq = 0

# Show age of message if message is older than show_age_threshold
# seconds.
# Set to -1 to disable.
show_age_threshold = -1

# Split notifications into multiple lines if they don't fit into
# geometry.
word_wrap = yes

# Ignore newlines '\n' in notifications.
ignore_newline = no

# Hide duplicate's count and stack them
stack_duplicates = yes
hide_duplicates_count = yes


# The geometry of the window:
#   [{width}]x{height}[+/-{x}+/-{y}]
# The geometry of the message window.
# The height is measured in number of notifications everything else
# in pixels.  If the width is omitted but the height is given
# ("-geometry x2"), the message window expands over the whole screen
# (dmenu-like).  If width is 0, the window expands to the longest
# message displayed.  A positive x is measured from the left, a
# negative from the right side of the screen.  Y is measured from
# the top and down respectevly.
# The width can be negative.  In this case the actual width is the
# screen width minus the width defined in within the geometry option.
#geometry = "250x50-40+40"
geometry = "300x50-15+49"

# Shrink window if it's smaller than the width.  Will be ignored if
# width is 0.
shrink = no

# The transparency of the window.  Range: [0; 100].
# This option will only work if a compositing windowmanager is
# present (e.g. xcompmgr, compiz, etc.).
transparency = 5

# Don't remove messages, if the user is idle (no mouse or keyboard input)
# for longer than idle_threshold seconds.
# Set to 0 to disable.
idle_threshold = 0

# Which monitor should the notifications be displayed on.
monitor = 0

# Display notification on focused monitor.  Possible modes are:
#   mouse: follow mouse pointer
#   keyboard: follow window with keyboard focus
#   none: don't follow anything
#
# "keyboard" needs a windowmanager that exports the
# _NET_ACTIVE_WINDOW property.
# This should be the case for almost all modern windowmanagers.
#
# If this option is set to mouse or keyboard, the monitor option
# will be ignored.
follow = none

# Should a notification popped up from history be sticky or timeout
# as if it would normally do.
sticky_history = yes

# Maximum amount of notifications kept in history
history_length = 15

# Display indicators for URLs (U) and actions (A).
show_indicators = no

# The height of a single line.  If the height is smaller than the
# font height, it will get raised to the font height.
# This adds empty space above and under the text.
line_height = 3

# Draw a line of "separatpr_height" pixel height between two
# notifications.
# Set to 0 to disable.
separator_height = 2

# Padding between text and separator.
padding = 6

# Horizontal padding.
horizontal_padding = 6

# Define a color for the separator.
# possible values are:
#  * auto: dunst tries to find a color fitting to the background;
#  * foreground: use the same color as the foreground;
#  * frame: use the same color as the frame;
#  * anything else will be interpreted as a X color.
separator_color = frame

# Print a notification on startup.
# This is mainly for error detection, since dbus (re-)starts dunst
# automatically after a crash.
startup_notification = false

# dmenu path.
dmenu = /usr/bin/dmenu -p dunst:

# Browser for opening urls in context menu.
browser = /usr/bin/firefox -new-tab

# Align icons left/right/off
icon_position = off
max_icon_size = 80

# Paths to default icons.
icon_folders = /usr/share/icons/Paper/16x16/mimetypes/:/usr/share/icons/Paper/48x48/status/:/usr/share/icons/Paper/16x16/devices/:/usr/share/icons/Paper/48x48/notifications/:/usr/share/icons/Paper/48x48/emblems/


[frame]
width = 3
color = "#8EC07C"

[shortcuts]

# Shortcuts are specified as [modifier+][modifier+]...key
# Available modifiers are "ctrl", "mod1" (the alt-key), "mod2",
# "mod3" and "mod4" (windows-key).
# Xev might be helpful to find names for keys.

# Close notification.
close = ctrl+space

# Close all notifications.
close_all = ctrl+shift+space

# Redisplay last message(s).
# On the US keyboard layout "grave" is normally above TAB and left
# of "1".
history = ctrl+grave

# Context menu.
context = ctrl+shift+period

[urgency_low]
# IMPORTANT: colors have to be defined in quotation marks.
# Otherwise the "#" and following would be interpreted as a comment.
frame_color = "#3B7C87"
foreground = "#3B7C87"
background = "#191311"
#background = "#2B313C"
timeout = 4

[urgency_normal]
frame_color = "#5B8234"
foreground = "#5B8234"
background = "#191311"
#background = "#2B313C"
timeout = 6

[urgency_critical]
frame_color = "#B7472A"
foreground = "#B7472A"
background = "#191311"
#background = "#2B313C"
timeout = 8


# Every section that isn't one of the above is interpreted as a rules to
# override settings for certain messages.
# Messages can be matched by "appname", "summary", "body", "icon", "category",
# "msg_urgency" and you can override the "timeout", "urgency", "foreground",
# "background", "new_icon" and "format".
# Shell-like globbing will get expanded.
#
# SCRIPTING
# You can specify a script that gets run when the rule matches by
# setting the "script" option.
# The script will be called as follows:
#   script appname summary body icon urgency
# where urgency can be "LOW", "NORMAL" or "CRITICAL".
#
# NOTE: if you don't want a notification to be displayed, set the format
# to "".
# NOTE: It might be helpful to run dunst -print in a terminal in order
# to find fitting options for rules.

#[espeak]
#    summary = "*"
#    script = dunst_espeak.sh

#[script-test]
#    summary = "*script*"
#    script = dunst_test.sh

#[ignore]
#    # This notification will not be displayed
#    summary = "foobar"
#    format = ""

#[signed_on]
#    appname = Pidgin
#    summary = "*signed on*"
#    urgency = low
#
#[signed_off]
#    appname = Pidgin
#    summary = *signed off*
#    urgency = low
#
#[says]
#    appname = Pidgin
#    summary = *says*
#    urgency = critical
#
#[twitter]
#    appname = Pidgin
#    summary = *twitter.com*
#    urgency = normal
#
# vim: ft=cfg