12 GR-LEON4-ITX Development Board
Quick Start Guide
Username Password Description
user user Normal user account.
root root Super-user account. Should only be used for system administration.
Table 3-1: System accounts
3.4 Shutting down the System
To protect the integrity of the file system, the system software should be properly shut down
before powering down the board. The correctly shut down the system, issue the command:
shutdown -h now
This command must be issued as the super-user (root). After the system has reported that is
going down for system halt there will be no more output on the serial terminal. The system
will report Halt on the frame buffer console when it is safe to power-off the board. If an
external screen is not connected, it can be assumed safe to power-off the system 90
seconds after the The system is going down for system halt NOW! message has been
displayed on the serial terminal.
3.5 Graphical Interface (X Window System)
The X window system graphical interface can be started from the command line by using the
command startx. This will launch a session using the BlackBox window manager, right-click
on the mouse will bring up the menu.
Other window managers can be started by editing the .xsession file in the home directory
(for the user account, /home/user/.xsession). If the file is changed to exec fvwm2, startx will
launch an X session using the FVWM window manager (http://www.fvwm.org).
The graphical interface has a menu option to shut down the system, but this is not supported
by the hardware. Instead, X should be exited back to the shell before the system is shut
down.
The X window system may show some instabilities, particularly when exiting the graphical
interface. If this leads to the system being inaccessible from the keyboard and mouse it is
typically still possible to connect to the system via another interface, such as the serial
terminal or network.
3.6 Network Interface
The network interface is configured during system start-up with the information contained in
the file /etc/network/interfaces. The default content of this file is:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
To assign a static IP address the file contents could be changed to, for instance:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
© Aeroflex Gaisler AB June 2010, Rev. 0.2
