Ssh keypair instead of passphrase

[betlog-betlog]

I would like to access root@recalbox via ssh keypair instead of a passphrase But: /root/ is apparently read only ~ ( /recalbox/share/system/ ) contains a ~/ssh/ directory (I was expecting it to be the more traditionally named: ~/.ssh/) but doing:

scp /home/user/.ssh/id_rsa.pub root@recalbox:/recalbox/share/system/

cat ~/id_rsa.pub >> ~/.ssh/authorized_keys

or even (into ~/ssh instead of ~/.ssh)

cat ~/id_rsa.pub >> ~/ssh/authorized_keys

does not allow me to log in without entering the passphrase. The linux used by recalbox is increasingly unusual to me. Can someone please explain how to enable passwordless keypair SSH logins?

[Substring]

Which recalbox version do you have ? /root is not used anyomore on recalbox 4.0.0. Instead, root's home moved to /recalbox/share/system. This is where you should setup your keys, and it works perfectly i personnaly love using ssh-copy-id for such matters

[betlog-betlog]

The unstable, auto-updated, most recent version. Naturally I did try adding them to //recalbox/share/system. But evidently I'm too familiar with debian and not with .... what IS recalbox's distro called? Would you mind throwing some relevant command lines at me please? The way recalbox's flavor of linux works in not familiar to me at all.

[betlog-betlog]

For example, I think I know what I'm doing, yet sti still requires a password after I get what looks like a positive insertion of an authorized_key... user@betlognuc:~$ ssh-copy-id -i ~/.ssh/id_rsa.pub root@recalbox /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@recalbox's password: Number of key(s) added: 1 Now try logging into the machine, with:   "ssh 'root@recalbox'" and check to make sure that only the key(s) you wanted were added. user@betlognuc:~$ ssh root@recalbox root@recalbox's password: # cd .ssh # ls -al total 12 drwx------    2 root     root          4096 Jul 13 06:07 . drwxr-xr-x   15 avahi    avahi         4096 Jul 13 06:07 .. -rw-------    1 root     root          2809 Jul 13 06:07 authorized_keys # cat authorized_keys ssh-rsa **** yep, it's there*** buuuut.... # shutdown -r now Broadcast message from root@RECALBOX (pts/0) (Wed Jul 13 06:09:31 2016): The system is going down for reboot NOW! # Write failed: Broken pipe user@betlognuc:~$ user@betlognuc:~$ ssh root@pilan root@pilan's password: ...it still asks for the password... and the whole idea of adding the pubkey is so it doesn't. What am I missing here?