SSH public key - Login without password

SSH is the leading solution for securily logging into servers.

Many products use SSH in the background: git, rsync, ansible...

Public key authentication is quite convenient. You don't need to type your password for every 'git push' or 'ansible-playbook'. Use correctly, it can also make your server more secure.

Hello Ansible

Write infrastructure-as-code, control multiple machines easily.

In this Ansible tutorial, we create a single file in /tmp/.

Palvelinten Hallinta

Control 10, 100, 1000 many computers.

Or control 2071 computers, like Jussi did on a earlier course. Or handle 7 different operating systems and OS versions with a single master, like Matias.

Best instance got 5.0 / 5 feedback - all respondents gave the best grade 5.

Tunkeutumistestaus

Learn to hack computers to protect your own. In the course, you will break into target computers.

Excellent feedback, reached 5.0 out of 5.

Verkkoon tunkeutuminen ja tiedustelu

Attack the network between machines. Capture radio transmissions. Copy key cards. Attack WiFi.

Maybe even some software radio...

Information Security - 2026 early spring

Understand adversarial view on security. Recognize key concepts of security. Be able to safely practice hands-on with security tools.

Face-to-face in a real life classroom. In English.

Linux Palvelimet 2026 alkukevät online

Learn to manage your own Linux server – in 8 weeks.

100% remote. Weekly video conference + a lot of individual work. Beginners welcome. Excellent feedback. In Finnish.