Error while rosdep update

Question

I executed the following command in Ubuntu 16.04

rosdep update

The error I am getting is as follows:

Internet is working fine and the links in error are also in working condition.

Answer 1

This was happened due to the issues with proxy update.

Even though I change proxy to NONE as shown below

The proxy did not update properly on shell. If I type echo "$http_proxy" or echo "$https_proxy", it was showing old proxy(which was down). So, it was the issue.

I restarted the system after this

Now, rosdep updated properly.