root@x1:~# grep apache /etc/init.d/.depend.start
TARGETS = rsyslog uuidd lvm2-lvmpolld lxd lxcfs lvm2-lvmetad open-vm-tools killprocs apport single apache2 irqbalance atd mdadm dbus cron rsync acpid ssh plymouth ondemand rc.local
INTERACTIVE = apache2
apache2: rsyslog
plymouth: rsyslog uuidd lvm2-lvmpolld lxd irqbalance lxcfs lvm2-lvmetad open-vm-tools atd mdadm dbus apport cron rsync acpid ssh apache2
ondemand: rsyslog uuidd lvm2-lvmpolld lxd irqbalance lxcfs lvm2-lvmetad open-vm-tools atd mdadm dbus apport cron rsync acpid ssh apache2
rc.local: rsyslog uuidd lvm2-lvmpolld lxd irqbalance lxcfs lvm2-lvmetad open-vm-tools atd mdadm dbus apport cron rsync acpid ssh apache2