Ubuntusu authentication failed

When using Ubuntu as the development environment, you often need to install some dependent frameworks globally. In this case, you often need to use the root permission. However, the first time you use the su command in Ubuntu, the system will prompt that the authentication fails; after searching for information, we found that the root permission in Ubuntu is locked by default, which may be considered as a security concern. However, developers must have the root permission.

In the command line, enter the following command to set the root password, so that you can use the root permission at any time:

Sweetvvck @ sweetvvck :~ $ Su password: su: authentication failed. sweetvvck @ sweetvvck :~ $ Sudo passwd [sudo] password for sweetvvck: enter a new UNIX password: re-enter the new UNIX password: passwd: the password has been successfully updated