How to Start Interactive Root Shell in Ubuntu with Sudo

This article provides a quick guide on launching an interactive root shell in Ubuntu using sudo. It covers the specific commands required to elevate privileges safely and explains the difference between common options. Readers will learn how to access the root environment and how to exit it properly.

Using the sudo -i Command

The most common method to start an interactive root shell is by using the -i flag. This simulates a login session as the root user. Open your terminal and enter the following command:

sudo -i

You will be prompted to enter your user password. Once authenticated, the command prompt will change, typically indicating that you are now operating as the root user. This method initializes the root environment variables and profile scripts.

Using the sudo -s Command

Alternatively, you can use the -s flag to run a shell with root privileges. This command does not simulate a full login session but still grants administrative access. Enter the following in your terminal:

sudo -s

This approach is useful if you want root permissions without changing the current environment variables associated with your standard user account.

Exiting the Root Shell

When you have finished your administrative tasks, it is crucial to exit the root shell immediately to maintain system security. Type the following command to return to your standard user session:

exit

Security Considerations

Running commands as root carries significant risk. Errors made while in an interactive root shell can damage the operating system or delete critical files. Only use these commands when necessary and always exit the root session as soon as your task is complete.