Running Qtcreator as root on ubuntu 13.04



  • So I just installed Ubuntu 13.04 and being a developer, installed the QT SDK.

    The problem is when I try to run the program as root, for example:

    $ sudo qtcreator

    The terminal just hangs and the program, Qt creator does not start up. Is this a problem with QT 5 or is it some bug in ubuntu 13.04? Either ways, anyone come across this before? Any solutions?

    I have completely updated my ubuntu version and Qt sdk. Still cant run it as root.



  • Why would you like to run Qt creator as root in the first place? It is usually not recommended to run GUI programs as root.


  • Moderators

    Please do not do this! Running complex applications like creator as root is a really bad idea. It is not secure and you should not develop as a root user anyway since developing includes doing lots of risky things that may damage your system badly when doing them wrong as root!

    You can set up a "Remote" linux device in Tools>Options>Devices using localhost as the hostname and any username you can log in as using SSH. Then set up a kit using this device (copy the desktop one, replace device type and device).

    Now you can "remote"-deploy, run and debug your applications to the same machine using a different user.



  • Sorry for the late reply.

    The project that I am working on requires me to use the serial interface, namely RS 232 or RS 485.

    Since QT does not have a native library, I use Qextserialport library.
    The problem is, linux (Ubuntu 13.04) does not allow me to access the serial port unless I am running the program or the software as root.

    Does anyone have an idea as to how I can get Qextserialport to work without starting QT as root?

    I use to work on QT 4.8 before and had no problems running it as root.



  • Can I try to change the file permission of the serial port file. Say, for example, the name of the serial file in question is ttyUSB0. So, if I try this:

    $ sudo chmod 777 /dev/ttyUSB0

    Since I am changing the 'rwx' state of the file for access by others apart from 'root', will this approach work?


  • Lifetime Qt Champion

    Hi,

    IIRC, the usb serial devices belong to the dialout group, add your user to this group. It's the cleanest and securest way to access it.


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