su is a utility to run a shell or other command as another user (root by default).

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2
votes
1answer
852 views

sulog with openSUSE 11.2 (x86_64)

I need to log as much as possible when users a doing su *... Best would be to log all commands especially for the case root does something as a user. We can assume root would not change this logging ...
8
votes
1answer
2k views

What is the difference between 'sudo' and 'su -c'

Is there any difference between using sudo and using su -c? There are situations where one should be used but not the other? I was previously using Ubuntu where sudo appears to be ubiquitous but now ...
11
votes
2answers
9k views

What is the difference between 'su -' and 'su root'? [duplicate]

Possible Duplicate: Why do we use su - and not just su? I understand that root doesn't have to be a superuser. But in the case that it is ... what is the difference between sudo su - and ...
3
votes
2answers
3k views

su vs su - (on Debian): why is PATH the same?

I know what should be the difference between su and su -, but in my system (debian testing) for example PATH is the same: [root]# su [root]# echo $PATH ...
4
votes
1answer
518 views

Why do I need to use newgrp or su (or logout and login again) to have new group memberships applied?

What is it that makes new group membership require a new login (or new login shell as started by su or newgrp) to be visible? Just running another bash (or whatever other shell) instance with --login ...
14
votes
1answer
1k views

What's the difference between sudo su - and sudo su --

When I am working on our RHEL machines, I use sudo su - to switch to being root. One day, a typo meant I typed sudo su -- instead - it seems to me that everything was the same as with a single hyphen, ...
2
votes
1answer
163 views

Is it possible to set su to use WE password dialog

I have sometimes problem when during entering password for su other window appears and steals the focus ("wait - did I just entered root password on public IRC chatroom?" - it did not happened but ...
2
votes
1answer
1k views

FreeBSD: Opening X applications after su to root?

Using FreeBSD 8.2. I'm accessing my machine over vnc using tightvnc. I log in as my normal user. This is okay. I can open X applications and they display fine. Then I su to root and they won't ...
13
votes
4answers
867 views

What is SSH - the protocol and what is ssh - the utility?

What is SSH - the protocol? What is ssh - the unix utility and how does it work? How is SSH protocol related to SFTP? What is sshd? Does the command su use ssh or sshd?
3
votes
2answers
1k views

How to trace a process to original user?

Say, on a Solaris server, user1 logs in, switches to someother user, say sruser, using su - and then starts a process of id X. And then another user user2 logs in, switches to sruser the same way and ...
6
votes
2answers
10k views

Is it possible to su without being prompted for a password?

I suspect su doesn't have any way to allow passing the password from the shell instead of being prompted for one, for security reasons (couldn't find anything in the MAN). Is this true?
4
votes
2answers
16k views

su options - running command as another user

I was wondering how to run a command as another user from a script. I have the script's owner set as root. I also have the following command being run within the script to run the command as the ...