Hi,
I've read on ssh, and I have my setup to use ssh with OpenWrt, I use key in .ssh + my config file in .ssh but if I want to use also ssh server as localhost, what I've read is that I should setup also in .ssh/config.
I use ssh for my router / openwrt
I have id_ed25519 pub key in .SSh
But if I want to setup ssh server on my PC also with login from id_ed25519, can I put the keys and config elsewhere or i need to put that in .ssh too.
I don't want interference
Run the following on the OpenWrt router, replacing pcip with the correct IP address of your PC. You will need to enter the root password of the PC (once) to upload the dropbear public key.
To be clear, this is not the correct location in some Linux distributions, hence I mentioned checking with the distro (and not the OpenWrt forum).
For example, in Ubuntu where the root account is "disabled", it's /home/<user>/.ssh/authorized_keys - assuming the OP installed and configured a SSH server for the distro that uses that.