Pretty much, RSA is your only reasonable, reliable & compatible option in OpenSSH

Whereas

  • DSA is deprecated in OpenSSH 7.0
  • ECDSA is not supported by GNOME Keyring.
  • Ed25519 is not supported by GNOME Keyring.

Folklore

Via SSH Keys, in Arch Linux Wiki

<quote>

<snip/>

  • As of July 10, 2015, GNOME Keyring does not handle ECDSA[4] and Ed25519[5] keys. Users will have to turn to other SSH agents or stick to RSA keys.
  • These keys are used only to authenticate you; choosing stronger keys will not increase CPU load when transferring data over SSH.

</quote>

Via How to save an SSH key passphrase in gnome-keyring? in Stack Exchange for Unix & Linux

cd $HOME/.ssh
/usr/lib/seahorse/seahorse-ssh-askpass my_key

References

In Arch Linux Wiki

In GNOME Wiki

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