Please, can someone help me. I can't continue to learn...

"No route to host" means that your computer can't find a route across the internet to connect to the host, keys.gnupg.net. This could be due to a variety of reasons:

• There is something wrong with your computer's internet connection. Try rebooting.
• Your network is interfering with this type of connection (very possible if you are connecting from an office or school). Try connecting using a different wifi network if possible.
• There was something wrong with the keys.gnupg.net host at the time you ran this command. Now that a day has passed, try the same command again and see if your connection is successful.

If it still doesn't work, please try running the command:

ping keys.gnupg.net

And then copy and paste the output you get into a comment on this forum thread. You should see something like this:

$ ping keys.gnupg.net
PING pool.sks-keyservers.net (51.15.129.69): 56 data bytes
64 bytes from 51.15.129.69: icmp_seq=0 ttl=52 time=145.074 ms
64 bytes from 51.15.129.69: icmp_seq=1 ttl=52 time=144.807 ms

Hello, thanks so much. I tried everything but it didn't work.

Here is the output for the command ping keys.gnupg.net

Theo$ ping keys.gnupg.net
PING pool.sks-keyservers.net (31.19.145.251): 56 data bytes
64 bytes from 31.19.145.251: icmp_seq=0 ttl=48 time=43.122 ms
64 bytes from 31.19.145.251: icmp_seq=1 ttl=48 time=42.389 ms
64 bytes from 31.19.145.251: icmp_seq=2 ttl=48 time=41.361 ms
64 bytes from 31.19.145.251: icmp_seq=3 ttl=48 time=41.655 ms
64 bytes from 31.19.145.251: icmp_seq=4 ttl=48 time=41.960 ms
64 bytes from 31.19.145.251: icmp_seq=5 ttl=48 time=43.752 ms
64 bytes from 31.19.145.251: icmp_seq=6 ttl=48 time=42.486 ms
64 bytes from 31.19.145.251: icmp_seq=7 ttl=48 time=41.520 ms
64 bytes from 31.19.145.251: icmp_seq=8 ttl=48 time=46.303 ms
64 bytes from 31.19.145.251: icmp_seq=9 ttl=48 time=42.298 ms
64 bytes from 31.19.145.251: icmp_seq=10 ttl=48 time=42.013 ms
64 bytes from 31.19.145.251: icmp_seq=11 ttl=48 time=44.783 ms
64 bytes from 31.19.145.251: icmp_seq=12 ttl=48 time=41.000 ms
64 bytes from 31.19.145.251: icmp_seq=13 ttl=48 time=41.557 ms
64 bytes from 31.19.145.251: icmp_seq=14 ttl=48 time=43.285 ms
64 bytes from 31.19.145.251: icmp_seq=15 ttl=48 time=41.417 ms
64 bytes from 31.19.145.251: icmp_seq=16 ttl=48 time=41.492 ms
64 bytes from 31.19.145.251: icmp_seq=17 ttl=48 time=42.317 ms
64 bytes from 31.19.145.251: icmp_seq=18 ttl=48 time=42.335 ms
64 bytes from 31.19.145.251: icmp_seq=19 ttl=48 time=41.067 ms
64 bytes from 31.19.145.251: icmp_seq=20 ttl=48 time=41.382 ms
64 bytes from 31.19.145.251: icmp_seq=21 ttl=48 time=41.500 ms
64 bytes from 31.19.145.251: icmp_seq=22 ttl=48 time=41.790 ms
64 bytes from 31.19.145.251: icmp_seq=23 ttl=48 time=42.159 ms
64 bytes from 31.19.145.251: icmp_seq=24 ttl=48 time=43.010 ms
64 bytes from 31.19.145.251: icmp_seq=25 ttl=48 time=42.790 ms
64 bytes from 31.19.145.251: icmp_seq=26 ttl=48 time=43.682 ms
64 bytes from 31.19.145.251: icmp_seq=27 ttl=48 time=41.717 ms
Request timeout for icmp_seq 28
64 bytes from 31.19.145.251: icmp_seq=29 ttl=48 time=40.950 ms
64 bytes from 31.19.145.251: icmp_seq=30 ttl=48 time=41.126 ms
64 bytes from 31.19.145.251: icmp_seq=31 ttl=48 time=41.411 ms

and so on...

https://rvm.io/rvm/security says:

In rare cases the gpg --keyserver is failing, use this instead:

curl -sSL https://rvm.io/mpapis.asc | gpg --import -

Can you copy and paste that command into your terminal? If it doesn't work, can you copy and paste the command and its output into another reply here?

Also, what version of Mac OS are you running? If it's very old then it might be missing some of the root certificates needed to establish secure connections to these servers.

MacBook-Pro-de-Theo-2:~ Theo$ curl -sSL https://rvm.io/mpapis.asc | gpg --import -
gpg: /Users/Theo/.gnupg/trustdb.gpg : base de confiance créée
gpg: clef 3804BB82D39DC0E3 : clef publique « Michal Papis (RVM signing) <mpapis@gmail.com> » importée
gpg:       Quantité totale traitée : 1
gpg:                     importées : 1
gpg: aucune clef de confiance ultime n'a été trouvée
MacBook-Pro-de-Theo-2:~ Theo$ 

Thats in French, but it says public key import total quantity : 1 imported : 1 no ultimate confidence key find

i'm currently running the last version of OS X on the last macbook pro model.

thanks for the help

tobiass-MacBook-Pro-3:~ tobiasjackson$ \curl -sSL https://get.rvm.io | bash -s stable Downloading https://github.com/rvm/rvm/archive/1.29.1.tar.gz Downloading https://github.com/rvm/rvm/releases/download/1.29.1/1.29.1.tar.gz.asc gpg: Underskrift lavet Søn 19 Feb 21:02:47 2017 CET gpg: bruger RSA nøgle 62C9E5F4DA300D94AC36166BE206C29FBF04FF17 gpg: God underskrift fra »Michal Papis (RVM signing) mpapis@gmail.com« [ukendt] gpg: også kendt som »Michal Papis michal.papis@toptal.com« [ukendt] gpg: også kendt som »[jpeg image of size 5015]« [ukendt] gpg: ADVARSEL: Denne nøgle er ikke certificeret med en troværdig underskrift! gpg: Intet tyder på at denne signatur tilhører ejeren. Primær nøglefingeraftryk: 409B 6B17 96C2 7546 2A17 0311 3804 BB82 D39D C0E3 Undernøglefingeraftryk: 62C9 E5F4 DA30 0D94 AC36 166B E206 C29F BF04 FF17 GPG verified '/Users/tobiasjackson/.rvm/archives/rvm-1.29.1.tgz'

Upgrading the RVM installation in /Users/tobiasjackson/.rvm/ RVM PATH line found in /Users/tobiasjackson/.mkshrc /Users/tobiasjackson/.profile /Users/tobiasjackson/.bashrc /Users/tobiasjackson/.zshrc. RVM sourcing line found in /Users/tobiasjackson/.profile /Users/tobiasjackson/.bash_profile /Users/tobiasjackson/.zlogin. Upgrade of RVM in /Users/tobiasjackson/.rvm/ is complete.

Tobias Jackson,

Thank you for using RVM!

We sincerely hope that RVM helps to make your life easier and more enjoyable!!!

~Wayne, Michal & team.

In case of problems: https://rvm.io/help and https://twitter.com/rvm_io

Upgrade Notes:

• WARNING: You have '~/.profile' file, you might want to load it, to do that add the following line to '/Users/tobiasjackson/.bash_profile':

  source ~/.profile

• No new notes to display.

tobiass-MacBook-Pro-3:~ tobiasjackson$