dpkg: error: unknown option --add-architecture.

Question

When I try to do

sudo dpkg --add-architecture i386 
[sudo] password for shailendra: 
dpkg: error: unknown option --add-architecture. 

this happens while installing skype.

Answer 1

Did you try to install Skype this way?

1. Add repository via terminal

   sudo sh -c 'echo "deb http://archive.canonical.com/ubuntu trusty partner" >> /etc/apt/sources.list.d/canonical_partner.list'
   

2. Tell your system to pull down the latest list of software from each archive it knows about via the terminal

   sudo apt-get update
   

3. Install Skype via terminal

   sudo apt-get install skype
   

Maybe this way of installation will help you.