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Questions tagged [su]

GENERAL SU SUPPORT IS OFF-TOPIC. Support questions may be asked on https://superuser.com. su is a utility to run a shell or other command as another user (root by default).

su is a Unix/Linux utility that runs a shell or a specified command as another user. By default, the other user is root, and su, with , is one of the two common ways of obtaining administrator privileges. Calling su usually requires typing the target user's password.

su originally stood for “super user” (it was only for running a root shell), and became later known as “substitute user” (or “switch user” or a number of similar backronyms) when it started accepting the target user name as an argument.

For system administration questions, see the su tag on Super User (for non-professionals), Server Fault (for professionals), or Unix & Linux.

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Why program still don't take screenshot after getting "su"?

I push the button and program get SU, but png file is 0 bytes weight. Logcat says Permission denied: can't read framebuffer pid=12844 uid=10087. So why that's so. My phone is rooted, program already get su. What's wrong? Button btn = (Button)…
user2177105
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Executing db2 command through ssh

trying to ssh to another system then perform db2 commands however using 'su db2admin -c' does not seem to work, although it works for normal system commands .. #!/bin/bash sshpass -p 'passw0rd' ssh root@server.com "su db2admin -c 'db2text…
bobbyrne01
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'su' command issue while executing through android application

Hi I'm trying to execute the 'su' command as following via an app. Process process = Runtime.getRuntime().exec("su"); process.waitFor(); Log.d("EXITVAL",Integer.toString(process.exitValue())); I'm getting exit value 1 ..Its returning 0 for other…
srooth
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Why do some commands require locks on Unix and others don't?

Recently, I'd been observing something interesting on our environment AIX 7.1. In an attempt to track down the issue, I created a small locking application in Java: import java.io.File; import java.io.RandomAccessFile; import…
WilliamMartin
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Missing matching quote with su -c in bash script

I want to write something like EXEC="sudo su -m root -c \"java Something\"" $EXEC & But i get the following error: Something": -c: line 0: unexpected EOF while looking for matching `"' Something": -c: line 1: syntax error: unexpected end of…
SpiKeDraGoN
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Cannot get permission prompt from SuperSU

I have an app which should execute some root commands. SuperSU version is 1.04. Su version is 1.02. Android 4.1.1. Device is Samsung Galaxy S3 - rooted. The problem is I cannot get a permission prompt from SuperSU. I've tried many things, but prompt…
drake ugly
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How can I see the loggedin users that have used 'su'

If I use a login shell to login as root then 'who' or 'users' commands will show an entry for the root user. However If I login with user1 and then use: 'su - root' Then the 'who' and 'users' command will not show an entry for root. Is there a way…
Marinos An
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How to execute code as other user within script?

I'm writing a script which automates the install of a mailserver, however some of my code has to be compiled from source because it is not in repositories. I have no problem with this, however, I have no idea what the best and most safe way is from…
Peter van Arkel
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Trouble with RunTime.exec("su")

I would like to run some shell command from my application but when i run : Process process = Runtime.getRuntime().exec(su); I have got an error : su: uid XXXXX not allowed to su. I do not understand why because I think my phone is rooted as in…
Luciflore
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SUDO - iOS FTP - Stuck

I have a script for MobileTerminal in iOS that requires su, is there any way I can add a command to the bash script to login as root without having to type su then the password? Cheers, Dec
Declan Land
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Copying to /system - android

I am been trying to copy a apk from assets of another apk to /system. Here is what I have done,it was working in my previous app but not in this.I have added permission for wrtiting external storage. It is successfully copying to internal…
Neal
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What does this command means "-c"?

I was looking at some codes, and found this code { "su", "-c", "reboot" } I know that this will make your phone to reboot, because it ask for su first then reboot, but I don't know what that -c means. Its like an enter button on the keyboard? also…
Rotary Heart
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OpenLDAP The LDAP server is unavailable

I have been trying to connect to our OpenLDAP server from asp.net for the last four days without success. Just before I pull off my hair, could any one out there have a solution that has worked( ie using c# asp.net to connect to OpenLDAP server).…
john
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Changing unix user in a shell script

I want to change the current user in a shell script in order to give the user the ability to execute the commands as an administrator, by passing the login and password as arguments. I want to have the ability to do something like : sh ./script.sh…
Yassir Ennazk
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Java execute Linux commands that require su?

What is the best way to run Linux commands that require "su" with Java? I want it to be very reliable, as for security goes I don't care much about it the system is not a production server. No one ever connects to the machine but myself. I thought…
Arya
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