Many of us wonder why Linux is secure than Windows.

So here are some security facts of Linux -

In Linux, each process runs in its own user and group. So the process doesn't get access to acces where it isn't allowed.

In Windows, when an application (virus) corrupts the registry, it crashes.

Think of the configuration files in Linux as the Windows registry. (/etc).

To change the configuration files, the process (its user/group) needs access to the file. So, it won't get the write access. Now, even if it gets access normally (eg. wrong file chmods), then it would be denied by the new Security system so called SELinux.

Most trusted applications won't access system files. When a virus or a non-trusted application eg a virus tries to access system files, it will be denied access using the above two methods.

Please comment if these reasons are wrong OR there are more reasons so that I can edit the article. :)