System Administration Guide: Basic Administration

Boot Arguments You Can Specify When Editing the GRUB Menu at Boot Time

The following list describes the boot arguments and options that can be specified by editing the GRUB menu at boot time:


Specifies the kernel to boot.


Prompts the user for configuration information.


Boots the system in single-user mode.


Specifies a reconfiguration boot.

The system probes all attached hardware devices and then assigns nodes in the file system to represent only those devices that are actually found.


Boots the system with verbose messages enabled.


Does not boot in clustered mode.


Boots the system with the kernel debugger enabled.

-m smf-options

Controls the boot behavior of the Service Management Facility (SMF). Included are two categories of options, recovery options and messages options.

-i altinit

Specifies an alternative executable as the primordial process. altinit is a valid path to an executable.

-B prop=value [,prop=value]...

Specifies kernel boot properties.

The following are various ways you can modify boot behavior in the GRUB menu by using the -B prop=val option:

-B console=ttya

Redirects the console to ttya.

-B acpi-enum=off

Disables Advanced Configuration and Power Interface (ACPI) enumeration of devices.

-B console=ttya,acpi-enum=off

Redirects the console to ttya and disables the ACPI enumeration of devices.

-B acpi-user-options=0x2

Disables ACPI entirely.

Note –

When properties are specified by using the eeprom command and on the GRUB command line, the GRUB command takes precedence.