authentication for removable drives in 12.4

Can anybody please help me to authenticate for removable drives. I have tried the following but none of the file listed seem to be in my file system. I'm using Ubuntu 12.4


First of all, backup the file. Open a terminal and run:
Code:
cd /usr/share/polkit-1/actions/ sudo cp org.freedesktop.udisks.policy org.freedesktop.udisks.policy-backup cd
then open the file:
Code:
gksu gedit usr/share/polkit-1/actions/org.freedesktop.udisks.policy

An entry in the file looks like this:
Code:
<action id="org.freedesktop.udisks.filesystem-mount"> <description>Mount a device</description> <message>Authentication is required to mount the device</message> <defaults> <allow_any>no</allow_any> <allow_inactive>no</allow_inactive> <allow_active>yes</allow_active> </defaults> </action>
The description of each entry is self-explanatory, it's in human readable format.

Now if you want password authentication by an admin user in order to mount an external drive, then change the authentication mode from yse to auth_admin or auth_admin_keep (it's like auth_admin but the authorization is kept for a brief period):
Code:
<action id="org.freedesktop.udisks.filesystem-mount"> <description>Mount a device</description> <message>Authentication is required to mount the device</message> <defaults> <allow_any>no</allow_any> <allow_inactive>no</allow_inactive> <allow_active>auth_admin_keep</allow_active> </defaults> </action>
You can change the authentication mode in other entries in a similar way.

Save the file and close the editor & you're done.

The above was for ubuntu 9.10 so maybe things have changed since then.

Thanks for any advise.

Your path is wrong - it's this, you were leaving out the red /

Quote:

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/usr/share/polkit-1/actions/org.freedesktop.udisks.policy

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So to edit the proper file

Code:

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gksu gedit /usr/share/polkit-1/actions/org.freedesktop.udisks.policy

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In 12.04 not all usb drives are treated as such so you may find that some like SanDisk drives won't be affected by your edit. In that case you need to edit a .pkla that allows active admin/sudo user to mount, check internal drives. If needed ask..

Thank you for taking the time to help me memc4man.
I now have my usb external drive mounted and I can read from it, problem is now I can't write to it, I get the message "you are not the owner" and I can't edit permissions. I'm hoping you can help me again.

Many thanks.