December 2018
Beginner
826 pages
22h 54m
English
Content preview from Linux Administration Cookbook
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Disabling passwords (force key use)
Because we've got our public keys on this host, we no longer need to allow password-based access.
Find the PasswordAuthentication line:
#PermitEmptyPasswords noPasswordAuthentication yes
Change this line to no:
#PermitEmptyPasswords noPasswordAuthentication no
Restart the SSH daemon:
[vagrant@centos2 ~]$ sudo systemctl restart sshd
The eagle-eyed among you will have noticed that I already flipped this setting once, in the Vagrantfile at the start of this chapter. This was to allow us to use Vagrant as a learning experience, and we are effectively reversing the reversal right now.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.