Problem with Thor setup

[guastellavalerio]

Hi everyone,
I am trying to install Thor on linux Ubuntu ( version Trusty tahr). I am following the instructions available on the website of the software (thor). Everything seems fine. I managed to add the following entry in /etc/apt/sources.list
deb http://deb.torproject.org/torproject.org trusty main
deb-src http://deb.torproject.org/torproject.org trusty main

However, afterwards, before to continue with the install ,for security reasons is required to run the following lines on the terminal

gpg --keyserver keys.gnupg.net --recv 886DDD89
gpg --export A3C4F0F979CAA22CDBA8F512EE8CBC9E886DDD89 | sudo apt-key add -

I run them in one line summing them with &&
and the outcome is

gpg: requesting key 886DDD89 from hkp server keys.gnupg.net
?: keys.gnupg.net: Host not found
gpgkeys: HTTP fetch error 7: couldn't connect: Success
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0

I do not understand what is happening, the website does not provide any further explanations and i could not find any threads on this.
Please help me

[hubutm20]

"keys.gnupg.net: Host not found"
try gpg --keyserver keyserver.ubuntu.com --recv 886DDD89