pre_install() { echo " ==> You can boot up systemd any time if systemd is used for udev." echo " ==> Add 'init=/usr/lib/systemd/systemd' to kernel command line." } post_install() { echo " ==> Install one of the optional depends for network support!" } post_upgrade() { post_install "$1" } post_remove() { echo " ==> Make sure you install systemd-sysvcompat before you reboot!" }