Comments on: Chapter 3: Exploring Embedded Linux Systems

By: Jacob

Jacob — Tue, 05 Jan 2021 04:38:58 +0000

Page 88. I think you meant to say rename instead of reboot when using hostname commands.

By: Dave

Dave — Tue, 10 Nov 2020 11:01:56 +0000

p128:” echo “Just some text” > newfile.txt ” generates permission denied error. I tried ‘sudo’ before the command without luck.

‘sudo nano newfile.txt’ in /test does the trick

Super book. It’s challenging for me being relatively new to programming but very enjoyable

By: Oscar

Oscar — Thu, 30 Apr 2020 17:45:31 +0000

Hi,
In p. 88 at the end of the page there is the sentence “For example, you can reboot your board by typing the following:” The following commands do not correspond to reboot, it has other commands instead. The right command is at the end of the page “sudo init 6”

Also, I followed the steps to change the shell prompt to “debian@ebb” but it did not work.

Commands:
debian@beaglebone:~$ sudo hostnamectl –static set-hostname ebb
debian@beaglebone:~$ hostname
ebb
debian@beaglebone:~$ more /etc/hosts
127.0.0.1 localhost
127.0.1.1 beaglebone.localdomain beaglebone

Note: it does not contain “ebb” as it is in the book example

Thanks

By: Steve

Steve — Wed, 20 Nov 2019 23:03:47 +0000

Hi Derek- I can’t get the pg 80 “Example to Mount SD card…” to work. Also it says there is a further step in the chapter web pages that details how to make the SD mount automatically on boot, where is that?
I can’t find the instructions for “To deal with this on the chapter web page for exploringbeaglebone.com/chapter3/ in the section “Mounting the SD Card Automatically” I use the UUID of the device to ensure that the correct device is mounted.” I’m ON the chapter web page, where is it? -Thanks

By: Brian

Brian — Tue, 10 Sep 2019 02:38:58 +0000

In reply to Brian.

Answering my own problem ~)
The iso image I had was the armhf intended for the BBB. I changed the image to debian ‘Buster’ i386 and that booted.

My next issue was during install it could not connect to the internet so it did a minimal install. Now I’m trying to connect the VM to the internet. Note as an aside I did get the BBB connected to the internet via my host using the USB interface.
For the VM I edited the /etc/network/interfaces file to add the domain gateway and IPv4 address. After doing this and rebooting I still cannot ping the internet. My domain gateway is 10.0.0.1 and the IPv4 address is 10.0.0.247. These are for my host wireless LAN adapter. From the host I can ping these addresses and get data but from the VM I get the address is not reachable from 10.0.0.247.

Once I can connect to the internet I’m assuming I can update all debian packages to get a full install.
Any suggestions? ~Thanks,

By: Brian

Brian — Sat, 07 Sep 2019 22:58:41 +0000

Hi,

I’m proceeding to try and use Debian Buster. I installed VirtualBox with the 2Gig of memory and a 32Gig VDI Device drive. The IDE controller is set to virtual optical drive primary master and pointing to my iso file of Debian Buster. When I start the VM it reports No Bootable Device
My VM system is set to boot from Optical 1st and Hard disk 2nd (My laptop has only a hard drive and no CD). What am I missing here ? I’m assuming the ‘Optical’ drive is a virtual device that is really accessing my hardwares HD ?

Thanks
Brian

By: Brian

Brian — Sat, 07 Sep 2019 22:02:23 +0000

Hi,
I’m working through your book, thank you for such a great resource. I’m ready to install the cross-compilation tools. Can I go ahead and use Debian Buster ? That’s the latest stable build as of today’s date. Are there any problems reported in the toolchain for this build ?

Thanks,
B

By: ben nguyen

ben nguyen — Sat, 11 Jun 2016 16:49:08 +0000

Everything up to installing the armhf toolchain works fine (vm image debian 8.5), but installing the toolchain fails.. seemingly due to incompatible packages?

root@bbbdebian:/home/bbbguest# apt-get install crossbuild-essential-armhf
Reading package lists… Done
Building dependency tree
Reading state information… Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
crossbuild-essential-armhf : Depends: libc6-dev:armhf but it is not going to be installed
Depends: gcc-arm-linux-gnueabihf (>= 4.9.1-1) but it is not going to be installed
Depends: g++-arm-linux-gnueabihf (>= 4.9.1-1) but it is not going to be installed
Depends: dpkg-cross but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
root@bbbdebian:/home/bbbguest#

Is there some known incompatibility? What version of jessie 8.? is this known to work with?

By: Harpreet

Harpreet — Wed, 18 May 2016 12:51:49 +0000

Hello Derek,
I am using VMware and debian 8 Jessie, I also installed mkudevrule.sh for Beaglebone. But still not able to connect with Beaglebone through SSH. In windows with putty its working flawlessly. Could you please guide me for this.

By: Derek

Derek — Tue, 04 Aug 2015 23:43:17 +0000

In reply to Stephan. Hi Stephan, yes, the ISO has to be mounted -- I have updated the guide on the page. Thanks for that, Derek.