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I have tried:

Untrusted Application Launcher

and

Untrusted application launcher?

neither of above applies to this case, as I made a symbolic link:

/usr/share/applications$ ls -la onboard.desktop
-rwxr-xr-x 1 root root 326 Apr  7 12:21 onboard.desktop

~/Desktop$ ls -la
lrwxrwxrwx  1 lj lj   39 Jul 26 22:22 onboard.desktop -> /usr/share/applications/onboard.desktop

unity claims owner is root, and as it may be noted x flag is on.

finally this was working until last update (yesterday)

14.04lts/unity

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Lj MT
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2 Answers2

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I had the same issue on ubuntu 18.04: .desktop file in /usr/share/applications, owned by root with permissions 644, and a link to it in many users desktop.
If a user double clicks on the link in their Desktop directory, the "Untrusted application" dialog pops up, because (I think) the link is treated as a normal file, which can't be executed in /home or /tmp directories without executable bit set, as explained in: Permission of a .desktop file

To fix this, a chmod +x /usr/share/applications/app.desktop was sufficient.

Alberto Chiusole
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The file is owned by root on your system,this location is in the root file system /usr/share/applications/onboard.desktop. Try this

1 make a new folder in your home folder and put your .desktop in this new folder

2 open a terminal and type sudo -i and enter your password

3 Type cd then drag and drop the new folder you made on the terminal, this will enter that folder.

4 type chmod +x onboard.desktop

This will change the permissions of the file as root and should allow your user access to the file.

NOTE any file you see with a little padlock icon is owned by another user

Please look here for how to properly make a .desktop LINK

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Mark Kirby
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  • from your answer I figure that it is better to copy .desktop file than to sym-link it. Indeed cp /usr/share/applications/onboard.desktop ~/Desktop did create launchable icon. – Lj MT Aug 23 '14 at 08:18