How do I login as 'su into the GUI

Hello

I have developed an application which uses the USB port amongst other things. Currently to run this application I need to run terminal, login as 'su' and then the application otherwise it gives me a permission denied error.

If I try to directly try to run the programme from the desktop gui by clicking on the icon of the application, it gives me permission denied error.

How do I get this application to work from the DESKTOP Gui without running it from terminal prompt and having to login as 'su'

Is there someway I can log into the GUI as 'su'

How do I create users and set access privilages.

Thanks for you help in advance.

Karbhari

 

1. Start a shell in a terminal session. If you are using Linpus then press ALT+F2, check the "Run in terminal" box and press enter. A terminal window with a shell prompt should appear.

2. Let's assume that your binary that needs to run with root privileges is "/root/myprog". Execute the following commands at the bash prompt:

Code:

sudo chown root:root /root/myprog
sudo chmod 4755 /root/myprog

The relevant concept is "setuid": http://en.wikipedia.org/wiki/Setuid

 

Another avenue is to make the user a member of the group that the device is in.

For instance: audiodevices are owned by root and in the group 'audio'.
If a user is not in the group 'audio' audio does not work ( 'permission denied' ).

The command "groups" can be used to see the groups the user is in.

--Japser.

 

Logging in as root is a bad idea. If you really want to do it though, I can teach you. Fair warning though, you will find out the hard way why its a bad idea. Its always better to sudo.