Install a self-signed certificate in ubuntu-based systems

Install a self-signed certificate in ubuntu-based systems
http://askubuntu.com/questions/73287/how-do-i-install-a-root-certificate

Given a CA certificate file 'foo.crt', follow these steps to install it on Ubuntu:
First, copy your CA to dir /usr/local/share/ca-certificates/

sudo cp foo.crt /usr/local/share/ca-certificates/foo.crt

then, update CA store

sudo update-ca-certificates

That's all. You should get this output:

Updating certificates in /etc/ssl/certs... 1 added, 0 removed; done.
Running hooks in /etc/ca-certificates/update.d....
Adding debian:foo.pem
done.
done.