initramfs-kernel

kernel runs /init.

/init is a script which sets INITRAMFS=1 and then execs /sbin/init.

/sbin/init is ELF comes from procd package. What it does (as pid=1):

• early:
  • mount /proc, /sysfs, and create /dev nodes, create /tmp subdirs etc
  • set PATH
• kmodloader in subprocess (waits until done)
• preinit
  • plugd in subprocess (seem to deal with firmware)
  • /etc/preinit in subprocess
• when /etc/preinit is done then it execvp the "real" /sbin/procd