## 7.4 Kernel Interaction During Boot 

Once the kernel is loaded by either [ loader](boot-blocks.html#BOOT-LOADER) (as usual) or [ boot2](boot-blocks.html#BOOT-BOOT1) (bypassing the loader), it examines its boot flags, if any, and adjusts its behavior as necessary.

### 7.4.1 Kernel Boot Flags 

Here are the more common boot flags:

`-a`:: during kernel initialization, ask for the device to mount as the root file system.`-C`:: boot from CDROM.`-c`:: run UserConfig, the boot-time kernel configurator`-s`:: boot into single-user mode`-v`:: be more verbose during kernel startup

 **Note:** There are other boot flags; read [boot(8)](http://leaf.dragonflybsd.org/cgi/web-man?command#boot&section8) for more information on them.



CategoryHandbook
CategoryHandbook-booting