<P> For a number of reasons, the sudo approach is now generally preferred--for example it leaves an audit trail of who has used the command and what administrative operations they performed . </P> <P> Some OSes, such as macOS and some Linux distributions (most notably Ubuntu), automatically give the initial user created the ability to run as root via sudo--but configure this to ask them for their password before doing administrative actions . In some cases the actual root account is disabled by default, so it can't be directly used . In mobile platform - oriented OSs such as Apple iOS and Android, superuser access is inaccessible by design, but generally the security system can be exploited in order to obtain it . In a few systems, such as Plan 9, there is no superuser at all . </P> <P> In Windows NT and later systems derived from it (such as Windows 2000, Windows XP, Windows Server 2003, and Windows Vista / 7 / 8 / 10), there must be at least one administrator account (Windows XP and earlier) or one able to elevate privileges to superuser (Windows Vista / 7 / 8 / 10 via User Account Control). In Windows XP and earlier systems, there is a built - in administrator account that remains hidden when a user administrator - equivalent account exists . This built - in administrator account is created with a blank password . This poses security risks, so the built - in administrator account is disabled by default in Windows Vista and later systems due to the introduction of User Account Control (UAC). </P> <P> A Windows administrator account is not an exact analogue of the Unix root account--Administrator The built - in administrator account and a user administrator account have the same level of privileges . The default user account created in Windows systems is an administrator account . Unlike macOS, Linux, and Windows Vista / 7 / 8 / 10 administrator accounts, administrator accounts in Windows systems without UAC do not insulate the system from most of the pitfalls of full root access . One of these pitfalls includes decreased resilience to malware infections . </P>

The super user with all administrative privileges on a unix system has what user name