I was getting started with the torch and faced the error here is how I got it resolved.

step 1. goto home->torch, open install-deps find the keyword python-software-properties and replace it with software-python-common save and exit.

Step 2. install the software-python-common with the command

sudo apt-get install software-properties-common 

Step 3. run the command

cd ~/torch; bash install-deps;

you are done!!

I was getting started with the torch and faced the error.
Here is how I got it resolved.

1. goto

   Home -> Torch -> Open install-deps

   find the keyword python-software-properties and replace it with software-python-common, save and exit.

2. install the software-python-common with the command

    sudo apt-get install software-properties-common 
   

3. run the command

    cd ~/torch; bash install-deps;
   

You are done!!