inittab (5) - Linux Manuals
inittab: init daemon configuration
NAME
inittab - init daemon configuration
SYNOPSIS
/etc/inittabDESCRIPTION
The /etc/inittab file was the configuration file used by the original System V init(8) daemon.The Upstart init(8) daemon does not use this file, and instead reads its configuration from files in /etc/init. See init(5) for more details.