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ODROID XU4 USER MANUAL
On some monitor models, one of the HDMI inputs is intended to
work with a PC and will disable overscan for that input (often HDMI 2).
You can also look at the monitor’s HDMI connectors for a label such
as PC Input, or read the monitor users manual to ind the correct input
to use if applicable.
If you have used one of the above methods to change your LCD
monitor’s display mode and it does not help, or if your monitor does
not provide an overscan adjustment, use one of the following methods
to adjust the XU4 video output directly.
Adjusting Linux Display Output
Installing xrandr and using the transform command can help ix
an overscan issue inUbuntu. Here is a typical adjustment using xran-
dr, which should be typed into a Terminal window:
$ xrandr –output HDMI-1 \
–transform 1.05, 0, -35, 0, 1.05, -19, 0, 0, 1
Command Line Interface
The Linux terminal CLI is the basic method of interacting with the
Linux system, normally using a shell called BASH. When a graphical
system is running, a Terminal window may be launched in order to is-
sue commands using the keyboard.
Many Linux systems also come with the Secure Shell (SSH)
server, which allows a command line interface to be invoked from a re-
mote computer via Ethernet. Other protocols, such as Virtual Network
Computing (VNC) have the ability to project the graphical environment
to a remote computer as well.
BASH is a powerful scripting language as well as a means of
reading, creating, modifying, and launching iles and programs that
are stored in the Linux ile system. A collection of BASH commands,
called a script, can be saved to a ile with the extension “.sh” and used
as an executable ile. A shell script can perform many tasks, such as
coniguring program variables, launching an application, and copying
or moving iles.
Disk Partitions
Linux can read and write to a variety of disk formats, with the
most common called EXT3, EXT4, and FAT. If disk compatibility with
Windows and OSX is a priority, it is recommended to format external
drives as FAT32 which can be read by nearly all operating systems.
The root ilesystem of Linux is usually in EXT3 or EXT4 format, which
can only be read by other Linux systems.
Disk partitions may be easily resized in order to use all of the
Chapter 3