## DEBIAN_FRONTEND 

This boot parameter controls the type of user interface used for the installer. The current possible parameter settings are: 

• DEBIAN_FRONTEND=noninteractive 

• DEBIAN_FRONTEND=text 

• DEBIAN_FRONTEND=newt 

• DEBIAN_FRONTEND=gtk 

The default frontend is DEBIAN_FRONTEND=newt . DEBIAN_FRONTEND=text may be prefer- able for serial console installs . Some specialized types of install media may only offer a limited selection of frontends, but the newt and text frontends are available on most default install media. On architectures that support it, the graphical installer uses the gtk frontend. 

## BOOT_DEBUG 

Setting this boot parameter to 2 will cause the installer’s boot process to be verbosely logged. Setting it to 3 makes debug shells available at strategic points in the boot process. (Exit the shells to continue the boot process.) 

BOOT_DEBUG=0 

This is the default. 

BOOT_DEBUG=1 

More verbose than usual. 

BOOT_DEBUG=2 

Lots of debugging information. 

BOOT_DEBUG=3 

Shells are run at various points in the boot process to allow detailed debugging. Exit the shell to continue the boot. 

## INSTALL_MEDIA_DEV 

The value of the parameter is the path to the device to load the Ubuntu installer from. For exam- ple, 

log_host log_port 

Causes the installer to send log messages to a remote syslog on the specified host and port as well as to a local file. If not specified, the port defaults to the standard syslog port 514. 

lowmem 

Can be used to force the installer to a lowmem level higher than the one the installer sets by default based on available memory. Possible values are 1 and 2. See also Section 6.3.1.1. 

