8 Critical Mistakes to Avoid After Installing Linux

Linux gives you the freedom to do anything you want, but there are several things you should never do on a fresh installation.

1. Copying random commands from the Internet

New users often paste commands without understanding them, which can be risky. Always research and comprehend a command before executing it, especially dangerous ones like sudo rm -rf --no-preserve-root /.

2. Running every command as root

Linux assumes you know what you’re doing and rarely warns you. Using sudo, su or doas grants full system access, which can be dangerous if overused. Only use elevated privileges when absolutely necessary and you trust the program.

3. Deleting files in the root directory arbitrarily

The Linux filesystem separates user data (home) from system files. Deleting files outside your home can break applications or render the system unbootable.

4. Adding unknown PPAs or package sources

Official repositories are maintained by many contributors and are generally safe. Third‑party PPAs may contain malicious code, so verify the source before adding it.

5. Switching back to Windows or hopping between distributions

Adjusting to Linux can be uncomfortable at first, but persisting with a beginner‑friendly distro for a few months helps you learn its tools and avoid confusion from multiple package managers and desktop environments.

6. Being afraid of the command line

The terminal is an essential part of Linux. Even if a distro tries to hide it, many tasks still require command‑line interaction.

7. Pressuring friends and family to switch to Linux

It’s fine to recommend Linux, but do so respectfully and recognize that different users have different needs.

8. Underestimating the power of backups

Regular backups or snapshot utilities can save your data if the system becomes unusable. Setting up automated snapshots is far better than regretting data loss later.

Now you know what not to do on Linux

Understanding these prohibitions helps beginners avoid accidental system damage and makes the transition to Linux smoother.