Copying those SSH keys around
Under linux, use the command “ssh-copy-id user@host” rather than playing around with the authorized_keys files and the id_dsa.pub or id_rsa.pub files. Â Life is so much easier.
What is this “notty” host?
In looking at the process listing on a linux server, an administrator may see a process listed as “sshd: root@notty”. An administrator, even a seasoned one, may immediately wonder “what is this ‘notty’ host?” and start down the path of trying to determine what host that is. However, sit back and take a deep breath:
Limiting access via SSH
Generally, it is a bad idea to allow regular users on a linux server. OpenSSH provides directives to control who does and does not have access via ssh: AllowUsers AllowGroups DenyUsers DenyGroups Any one of those directives can be used. AllowUsers and AllowGroups is defined as “allow only the users or the users of the