Hardware Reference
In-Depth Information
Considering a virtual machine
All the following explanations are for installation from Linux as a native operating
system. You can install directly on your computer or you can use a virtual machine
as well. If you want to make some developments or try some different projects, a VM
is the best solution. Similar to a Python virtual environment, which we have seen in
Chapter 4 , Getting Your Own Video and Feeds , virtual machines give you the freedom
to experiment with everything you want without losing your system.
There are many free virtualization managers that you can install; these are the most
famous ones:
• VirtualBox ( https://www.virtualbox.org/ ) : This is easy and fast
to configure.
• VMware (player) ( http://www.vmware.com ) : This is as easy as VirtualBox
but has some limitations in the free version.
• QEMU ( www.qemu.org ): This is harder to configure than the two previous
ones, but the only one that comes close to hardware emulation. This solution
is recommended when you don't have your ARM board with you but still
need to use it.
In addition, VirtualBox and QEMU are open source applications, so you will have
additional tools proposed by their respective communities.
Finding your SD card device
All the scripts provided are simple enough to require a single parameter: the SD card
device's name. Let's see two ways to check the SD card device's name.
You won't see the device until the SD card is effectively inserted,
and not just the USB reader.
Listing devices with lsblk
For example, after inserting an 8-GB SD card, we can use lsblk , a useful tool that is
provided with our Linux distributions ( http://linux.die.net/man/8/lsblk ).
The name stands for list block devices , so you have a tree of all the block devices
that Linux is able to manage.
 
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