Password caching is another mechanism that affects password management in sudo. However, it grants temporary and limited superuser privileges to the user. Secondly, the sudo command doesn’t switch to another user account completely. the root password isn’t exposed or shared with anyone, which enhances security.only users who are authorized to use sudo can execute commands as another user.Instead, it requires the user’s own password for authentication. Firstly, the sudo command doesn’t require the root password for access. The sudo command differs from the su command in several ways. The purpose of the sudo command is to enable users to execute specific commands that require higher privileges without switching to another user context completely. If we enter it correctly and are part of the sudoers, we’ll run an interactive shell as the superuser. We’ll be prompted to input our own password (not the root password). If we specify no command and use the -i option, the sudo command runs an interactive shell as another user: $ sudo -i sudo stands for superuser do and enables us to execute a single command as another user, usually the superuser: $ sudo The sudo command is another way to escalate privileges in Linux systems. They may also lose track of their current working directory and processes. This means that once a user switches to another user account using su, they may lose their identity and environment settings. However, the su command switches to another user account completely and may not preserve any information about the original user account. For instance, a user may want to switch to another user account that has access to a certain file or directory that they don’t have. Moreover, the purpose of the su command is to enable users to temporarily switch to another user account for performing specific tasks that require higher privileges. However, we should avoid creating a root password or trying to access the root user using the su command. Finally, we’ll confirm the new root password by entering it again. Then, we’ll be prompted to enter the new root password. To use the sudo command, we’ll first input our password. Still, we can set one using the passwd command: $ sudo passwd root If the above message showed up on your terminal, you can now enter as root from your current user entering the following command: suĪnd you will be prompted for the root password you've set.By default, root doesn’t have a password in most Linux distributions to prevent it from being used directly. The following message will appear after that: passwd: password updated successfully The messages prompted should be similar to the following: password for : You will be prompted for your current user's password, followed by the password you want to set for root. You may have noticed that you can’t log in as root on Ubuntu, this is because root doesn’t actually have a password set. Why is there no option to login as root?.See these questions for the reasons behind why sudo is preferred and why root-login is disabled by default: Note that desktop environments will also function incorrectly if you login to them as root. Warning: Directly logging in as root is like playing with fire, because one little typo is enough to lose critical data or make your system unbootable.
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