certuvia
Hands-on learning, right in your browser

Understand the tools.
Learn by using them.

Real Git. Real PostgreSQL. A Linux terminal ready to explore. Work through practical scenarios, try things out, and build skills that stay with you.

Find your course
Free to explore · No installation · No account needed
Your practice spaceGit lab
01 / TRY IT YOURSELF

Every change has a story.

See what’s changed, then save your first commit.

student@lab:~$ git status
On branch main
Changes not staged for commit:
modified: README.md
student@lab:~$ git add README.md
student@lab:~$ git commit -m "Update README"
[main a3f9c2e] Update README
1 file changed, 2 insertions(+)
A small step. A skill you can use.
CHOOSE YOUR NEXT SKILL

A place to start. Room to grow.

From your first command to everyday confidence.

71 hands-on labs

Git

Build a clear mental model of version control. Make commits, work with branches, and recover when things go wrong.

Commits · Branches · CollaborationExplore course
104 hands-on labs

PostgreSQL

Get comfortable with SQL and go deeper into databases. Query real data, understand indexes, and tune PostgreSQL.

SQL · Administration · PerformanceExplore course
More practice spaces are on the way
BunComing soonRegexComing soonSQLiteComing soonOpenSSL & CryptoComing soonSSHComing soonNGINXComing soon
A LITTLE PRACTICE GOES A LONG WAY

Less setup. More discovery.

01

Start with a real situation

Each lab gives you a practical problem and a clear next step. Learn why a command matters as you use it.

02

Try it in a real terminal

Your practice environment runs in the browser. Experiment freely, and reset the lab whenever you need a fresh start.

03

See your progress

Check each objective as you go. Completed lessons stay saved in this browser, so you can pick up where you left off.