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. Life is so much easier.
Linux systemd can be your friend
systemd messes with your mind. Definitely. The easy management of /etc/init.d/ files or /etc/rc.d files is easy to grasp; easy to get the mind around a simple ordering of complex events. Replace that with systemd, and the brain wants to revolt. But there are some upsides to this trend. systemd is smart. It can do
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: