Disclaimer

Test before you run

The articles, commands, configurations and tools on OhSudo are for educational and informational purposes. Each article says which systems and versions it applies to (“Applies to…”), but your environment is different: other versions, other settings, other data.

Shell, we have a problem!

Commands that change, delete or move data — rm, DROP, TRUNCATE, chmod -R, firewall rules, database migrations — can cause damage that cannot be undone. Try them on a test system first, read them twice, and make sure you have a working backup.

You are responsible for what you run on your systems. OhSudo is not liable for damage resulting from the use of its content — see our Terms of Use.

Versions change

Software changes fast. An article is correct for the versions it names and on the date it was last updated. If you find something outdated, tell us and we’ll re-test it.

The in-browser tools

The Terminal Playground emulates a Linux shell: the most common commands behave like GNU/Linux, but it is not a real operating system. The SQL Playground runs real PostgreSQL and SQLite engines in your browser; the SQL Dialect Reference shows examples for engines that can’t run in a browser (MySQL, MariaDB, SQL Server, Oracle), written from each vendor’s documentation.

Not professional advice

Nothing on OhSudo is legal, security-audit or professional consulting advice for your specific situation.

Trademarks and independence

Linux® is a registered trademark of Linus Torvalds. Docker, Kubernetes, PostgreSQL, MySQL, MariaDB, Microsoft SQL Server, Oracle, SQLite, Nginx, Traefik, Redis, MongoDB, RabbitMQ, WordPress, Prometheus, Grafana, Cloudflare and all other names mentioned on this site are trademarks of their respective owners. They are used only to identify the products we write about. OhSudo is independent and is not affiliated with, sponsored by or endorsed by any of these companies or projects, unless an article clearly says otherwise.

Affiliate links and sponsorships

OhSudo currently has no affiliate links and no sponsored content. If that changes, affiliate links and sponsored content will be clearly marked on the page where they appear, and this section will be updated.