I use Ubuntu server 16.04.1 LTS (Kernel 4.4.0-38-generic x86_64). And Install openssh-server(1:7.2p2-4ubuntu2.1). At first, I use below.
sudo systemctl enable ssh.service
But sshd doesn't start in boot process.
So, I check this Questions -> (SSH Daemon does not autostart)
And try this article -> (http://blog.roberthallam.org/2010/06/sshd-not-running-at-startup)
However, sshd doesn't start. (sudo service ssh status is dead.)
Of course, I check symbolic link of /etc/rc*.d/S**ssh is created.
Then I added below to /etc/rc.local.
/etc/init.d/ssh start
Finally, sshd does start on boot, but I wonder why normally process doesn't work. It might be because using usb wireless adapter, but I cannot be sure that. Please tell me what do you think.