I am using Ubuntu 14.04. I installed phusion passenger in my machine using the following commands.

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 561F9B9CAC40B2F7

sudo apt-get install apt-transport-https ca-certificates

echo 'deb https://oss-binaries.phusionpassenger.com/apt/passenger trusty main' | sudo tee /etc/apt/sources.list.d/passenger.list

sudo chown root: /etc/apt/sources.list.d/passenger.list

sudo chmod 600 /etc/apt/sources.list.d/passenger.list

sudo apt-get update

The installation is successful and I am also able to run passenger. But I am able to see the below error related to my package manager.

Because of this error software updater application is not working.

Can anybody help to solve this problem?