My short talk on building bitx at VWN ham meet Aluva.
I was trying to boot a newly installed Ubuntu box into text mode. The usual methods failed and after googling a little I figured out that Ubuntu 16,04 uses systemd for controlling startup services. The solution for the problem is
sudo systemctl enable multi-user.target sudo systemctl set-default multi-user.target
Mapping between runlevels and systemd targets
If you just want to change runlevel only
sudo systemctl isolate multi-user.target
Currently, I am using an Asus X200M netbook with ubuntu 14.04 lts. The keyboard of the netbook is slighly small compared to regular laptop. This is a slight drawback of all netbooks. For me it took only a couple of hours to get adjusted to the new keyboard.
However, while typing, my thumb inadertently touches the touch pad and the cursor jumps to some random location. I am always using an external mouse for navigation as I dont like to use t touch pad . So I decided to find out a way to disable the touch pad when I am typing long documents.
Here are the steps for disabling and enabling touch pad.
Look for the id of your touch pad. In my case the touch pad is detected as a logitec mouse and the id is 13. The other mouse shown in the figure is my external mouse. If in doubt, remove the external mouse and re run the command to find out the correct device id.
In order to disable touch pad type the following command.
$ xinput set-prop 13 "Device Enabled" 0
You can eneable the touch pad by changing 0 to 1 in the command above.
I have been tinkering with NodeMCU devkit boards recently. The easiest way to program these little beasts is to use arduino platform and install the compilers and other tools from . Unfortunately the stock arduino shipped with ubuntu 14.04 is quite old. You need a recent version of arduino software. to get the esp8266 board working.
Here is what I did.
Removed the existing arduio installation
$ sudo apt-get remove arduino
Download the appropriate arduino software from arduino.cc. This is available for both 32 bit and 64 bit editions. Choose the correct version.
The arduino software platfrom is written in Java. So install java runtime.
$ sudo apt-get install openjdk-7-jre
Unzip the arduino software and move it to an appropriate location. I moved it to /opt.
tar -xJf arduino-1.6.4-linux64.tar.xz
sudo mv arduino-1.6.4 /opt
Add appropriate path to .bashrc file.
I added PATH=$PATH;/opt/arduino-1.6.4/bin. Change it according to your arduino location and version.
Open a terminal and execute the new arduino.