The default username that is created during a new installation of Linux depends on the specific distribution of Linux you are using. Some common default usernames include:
root: This is the default superuser account on many Linux distributions. The root account has full privileges and can perform any action on the system.
pi: This is the default username for the Raspberry Pi operating system, Raspbian.
user: Some Linux distributions, such as Fedora, use a default username of user.
ubuntu: The default username for the Ubuntu operating system is ubuntu.
It's important to note that you can create additional users and customize their permissions and privileges during the installation process or after the system has been installed. It's generally recommended to create a separate non-root user account for everyday use, as using the root account can be a security risk.