SU(1)							      General Commands Manual							     SU(1)

NAME
       su - temporarily log in as superuser or another user

SYNOPSIS
       su [name]

EXAMPLES
       su		   # Become superuser

       su ast		   # Become ast

DESCRIPTION
       Su  can	be used to temporarily login as another user.  It prompts for the superuser password.  If the correct password is entered, su cre-
       ates a shell with the desired uid.  If no name is specified, root is assumed.  To exit the temporary shell, type CTRL-D.   When	memory	is
       tight,  it is better to become superuser by logging out and then logging in again as root, rather than using su since the latter creates an
       extra shell in memory.  Any user with a zero group id need not type a password.	This makes life easier for the system administrator.

SEE ALSO
       login(1).

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