su(1) General Commands Manual su(1)Name
su - substitute a user ID
Syntax
su [username]
su - [username]
su -f [username]
Description
The command requests the password of the specified username. If the correct password is given, changes to that username without changing
the current directory. The user environment is unchanged except for HOME and SHELL which are taken from the password file entry for user-
name. The shell that is run is also taken from the password file entry for username. The new user ID stays in force until the shell
exits.
If no username is specified, `root' is assumed. To remind the superuser of his responsibilities, the shell substitutes `#' for its usual
prompt.
Options-f Prevents from executing the .cshrc file, making start up faster.
- Simulates a full login.
Diagnostics
Sorry
An invalid password was supplied for the specified username.
Unknown login: username
The specified username was not found in the passwd database.
No directory
The home directory for the username is not accessible at this time (only with ``-'' argument).
No shell
The shell specified in the passwd database entry for username could not be executed.
Kerberos initialization failure
Consult your system administrator.
If enhanced security features are enabled the following error messages are also possible:
Requires secure terminal
Attempt to su to UID 0 on a line that is not marked secure in
User's password has expired
Access is denied because the password for username is expired.
This account is disabled
Access is denied because the auth entry corresponding to username is marked disabled.
Files
Log file of anyone who became
root, with a date mark.
See Alsocsh(1), sh(1), passwd(5yp), environ(7), edauth(8)
Security Guide for Administrators
Security Guide for Users
su(1)
Check Out this Related Man Page
dsenableroot(8) BSD System Manager's Manual dsenableroot(8)NAME
dsenableroot -- enables or disables the root account.
SYNOPSIS
dsenableroot [-d] [-u username] [-p password] [-r rootPassword]
DESCRIPTION
dsenableroot sets the password for the root account if enabling the root user account. Otherwise, if disable [-d] is chosen, the root
account passwords are removed and the root user is disabled.
A list of flags and their descriptions:
-u username
Username of a user that has administrative privileges on this computer.
-p password
Password to use in conjunction with the specified username. If this is not specified, you will be prompted for entry.
-r rootPassword
Password to be used for the root account. If this is not specified for enabling, you will be prompted for entry.
EXAMPLES -dsenableroot
Your username will be used and you will be queried for both your password and the new root password to be set to enable the root
account.
-dsenableroot -d
Your username will be used and you will be queried for only your password to disable the root account.
-dsenableroot -u username -p userpassword -r rootpassword
The supplied arguments will be used to enable the root account.
-dsenableroot -d -u username -p userpassword
The supplied arguments will be used to disable the root account.
Mac OS August 08 2003 Mac OS
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