## 7.5 Init: Process Control Initialization 

Once the kernel has finished booting, it passes control to the user process [init(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#init&section8), which is located at `/sbin/init`, or the program path specified in the `init_path` variable in `loader`.

### 7.5.1 Automatic Reboot Sequence 

The automatic reboot sequence makes sure that the file systems available on the system are consistent. If they are not, and [fsck(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#fsck&section8) cannot fix the inconsistencies, [init(8)](http://leaf.dragonflybsd.org/cgi/web-man?command=init&section=8) drops the system into [single-user mode](boot-init.html#BOOT-SINGLEUSER) for the system administrator to take care of the problems directly.

### 7.5.2 Single-User Mode 

This mode can be reached through the [automatic reboot sequence](boot-init.html#BOOT-AUTOREBOOT), or by the user booting with the `-s` option or setting the `boot_single` variable in `loader`.

It can also be reached by calling [shutdown(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#shutdown&section8) without the reboot (`-r`) or halt (`-h`) options, from [multi-user mode](boot-init.html#BOOT-MULTIUSER).

If the system `console` is set to `insecure` in `/etc/ttys`, then the system prompts for the `root` password before initiating single-user mode.

***'Example 7-3. An Insecure Console in `/etc/ttys`***'

    
    # name  getty                           type    status          comments
    #
    # If console is marked "insecure", then init will ask for the root password
    # when going to single-user mode.
    console none                            unknown off insecure


 **Note:** An `insecure` console means that you consider your physical security to the console to be insecure, and want to make sure only someone who knows the `root` password may use single-user mode, and it does not mean that you want to run your console insecurely. Thus, if you want security, choose `insecure`, not `secure`.

### 7.5.3 Multi-User Mode 

If [init(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#init&section8) finds your file systems to be in order, or once the user has finished in [single-user mode](boot-init.html#BOOT-SINGLEUSER), the system enters multi-user mode, in which it starts the resource configuration of the system.

#### 7.5.3.1 Resource Configuration (rc) 

The resource configuration system reads in configuration defaults from `/etc/defaults/rc.conf`, and system-specific details from `/etc/rc.conf`, and then proceeds to mount the system file systems mentioned in `/etc/fstab`, start up networking services, start up miscellaneous system daemons, and finally runs the startup scripts of locally installed packages.

The [rc(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#rc&section8) manual page is a good reference to the resource configuration system, as is examining the scripts themselves.



CategoryHandbook
CategoryHandbook-booting