root@imac-proxmox:~# echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM9bc+detfB05wQRfwrdlOTdZHNbruWT8O2RPELzmugv hermes-permanent-imac-proxmox' >>
    /root/.ssh/authorized_keys
-bash: syntax error near unexpected token `newline'
-bash: /root/.ssh/authorized_keys: Permission denied
root@imac-proxmox:~# echo 'ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM9bc+detfB05wQRfwrdlOTdZHNbruWT8O2RPELzmugv hermes-permanent-imac-proxmox' >>
    /root/.ssh/authorized_keys
-bash: syntax error near unexpected token `newline'
-bash: /root/.ssh/authorized_keys: Permission denied
root@imac-proxmox:~# cat >> /root/.ssh/authorized_keys << 'EOF'
    ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM9bc+detfB05wQRfwrdlOTdZHNbruWT8O2RPELzmugv hermes-permanent-imac-proxmox
    EOF
> ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM9bc+detfB05wQRfwrdlOTdZHNbruWT8O2RPELzmugv hermes-permanent-imac-proxmox
    EOF
> ^C
root@imac-proxmox:~#