De man ssh_config
:
~/.ssh/config
This is the per-user configuration file. The format of this file is described above. This file is used by the SSH client. Because of the potential for abuse, this file must have strict permissions: read/write for the user, and not accessible by others.
Suas chaves particulares e seu arquivo authorized_keys
devem ter o mesmo ( 600
), mas suas chaves públicas podem ter um 644
mais permissivo.