For example, when there is only one user account registered on the system, or when an automated script requires elevated privileges to perform certain tasks. In some cases, it may be useful to disable this mechanism. If you must enable the root user, see Apples technote: Enabling and using the 'root' user in Mac OS X. As others have stated, its best to use sudo. Running sudo su without a passwordīy default, a command run with sudo requires that the user authenticates themselves using their own password. 7 Answers Sorted by: 54 In MacOS X, the root user is disabled by default, therefore su will not work. Note that the sudo -su command differs from sudo su - in the sense that the su expression will be treated as option flags of the sudo command, where the -s flag is used to run a new shell, and the -u flag is used to run a command as a user different from root. Change the current directory to the user’s home directory.ĭon’t confuse sudo -su with sudo su -!.Initializes the environment variables HOME, SHELL, USER, LOGNAME and PATH. sudo su - will elevate any user (sudoer) with root privilege.Clear all the environment variables except for TERM.This solved two problems: The root user could be. Since the root account is disabled by default on most Linux distributions -which means that the root password is not set, in order to prevent anyone from directly logging into it-using the su command alone will certainly result in an authentication error with a message like su: Authentication failure: Sudo stands for 'superuser do' and effectively gives a regular user (one that belongs to the admin group) access to administrator-like powers. When called with no user specified, the su command will attempt to run an interactive shell as root, prompting you to enter the root password. Spawning a root shell with the su command In this article, we’ll explain why these two commands are often combined together in order to access a root shell, and how to run sudo commands without having to type in the user password. And because I'd like to log in as root as well. The first time you use sudo in a session, you will be prompted to enter the user password, and the command will be executed as root. Sudo will read the /etc/sudoers file and check whether the invoking user is granted with sudo assess. Possible Duplicate: How to know my root password I'd like to define a password for root so that I can use su directly, without having to prepend it with sudo. Where command is the command for which you want to use sudo. sudo resides in the fact that the su command gives access to an interactive shell session, whereas the sudo command only allows to execute one command at a time. 39 This question already has answers here : Closed 10 years ago. Like the sudo command, it is generally used to execute commands as the superuser (also known as the "root" user). See sudo documentation to learn how to do that.In Unix-like operating systems, the su command is used to temporarily log into another user account and execute commands using its privileges. So you may be able to do the above only if you are allowed to do sudo su without being prompted with password. However you will not be able to provide a password for su (see remote command execution limitations). With SCP protocol, you can specify the following command as custom shell on the SCP/Shell page of Advanced Site Settings dialog:.in /usr/lib/sftp-server, /usr/lib/openssh/sftp-server or /usr/libexec/openssh/sftp-server). Note that SFTP server binary may be located elsewhere 2 (e.g. With SFTP protocol, you can use SFTP server option on SFTP page of Advanced Site Settings dialog to execute SFTP binary under a different user.The SFTP and SCP protocols allow for this, but the actual method is platform dependent. In some cases (with Unix/Linux server) you may be able to use sudo command straight after login to change a user, before file transfer session starts.
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