/home/eda/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0/gems/net-ssh-6.1.0/lib/net/ssh/authentication/ed25519_loader.rb:21:in `raiseUnlessLoaded': OpenSSH keys only supported if ED25519 is available (NotImplementedError)
net-ssh requires the following gems for ed25519 support:
 * ed25519 (>= 1.2, < 2.0)
 * bcrypt_pbkdf (>= 1.0, < 2.0)
See https://github.com/net-ssh/net-ssh/issues/565 for more information
Gem::MissingSpecError : "Could not find 'ed25519' (~> 1.2) among 175 total gem(s)
Checked in 'GEM_PATH=/home/eda/.local/share/gem/ruby/3.0.0:/home/eda/.rbenv/versions/3.0.1/lib/ruby/gems/3.0.0' , execute `gem env` for more information"

ssh-add ~/.ssh/id_rsa.pub
# error
Could not open a connection to your authentication agent.

eval `ssh-agent -s`
ssh-add