I try to install rvm, but I hit "Network is unreachable" when I run the following command:
gpg --keyserver hkp://pool.sks-keyservers.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
gpg: keyserver receive failed: Network is unreachable
I was blocked by the same thing for a week. Finally finding this Reddit thread, which seems like the simplest explanation so far: https://www.reddit.com/r/GnuPG/comments/o5tb6a/keyservers_are_gone/ ...switching to keys.openpgp.org finally worked for me.
I had googled a lot and nothing at the top results worked. I tried the different hostnames, adding :80 port specification, prefixing 0x on the key signatures, and so on. Today I finally found that thread.
I had the same problem. Just to share how I solved, since accepted answer does not work for me:
1 - export the public key
gpg --export email@gmail.com > my_key.pub
2 - use the web interface at https://keys.openpgp.org/upload/submit to upload the certificate
I hope this help.