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I have a weird issue with Unity, it just stopped showing applications in the unity dash search menu.
I can't launch application unless I run them from the terminal.

I have tried to force unity re-installation with no success, and I could not find any other information regarding to this issue. Prior to full re-installation (I prefer not to, since my disk is encrypted) I am seeking for help. (I am a developer and would love to help with more information as needed).

An image

An image to applications is shown like this, when looking at Ubuntu dash search feature.

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I think you're talking about the Ubuntu dash search engine. You can upload a picture and leave only a link to it. – Gediminas Jeremiah Gudelis Aug 18 '13 at 15:20
ok - Thanks, this is the link to the image link – Moshe Beeri Aug 19 '13 at 7:46
Searching for applications missing in dash, I got to this post I re installed unity-lens-applications and unity-lens-files and log out, but nothing had changed, any idea?? – Moshe Beeri Aug 19 '13 at 7:57
trying this as well mv ~/.local/share/zeitgeist ~/.local/share/zeitgeist.bak – Moshe Beeri Aug 19 '13 at 8:20
That did not help either. is there a way to re-install the whole unity package? – Moshe Beeri Aug 19 '13 at 8:30

Try to remove and re-install unity-lens-applications

sudo apt-get purge unity-lens-applications    
sudo apt-get install unity-lens-applications 

Edit: Log off & login. If doesn't work restart your system (see comments)

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10x but it did not helped :-( Still can not see applications in dash! – Moshe Beeri Aug 29 '13 at 14:35
Any other suggestions? – Moshe Beeri Sep 2 '13 at 9:46
@rpadovani Just to say! Your tip work for me. But you need to restart your system after apply. Thanks for save my day! ;) – B4NZ41 Apr 12 '14 at 13:27
I had this same problem. Your solution worked for me. Thanks!! – Matt Caswell Oct 26 '14 at 21:25

Delete the .cache directory from home folder, logout and login again. It worked for me.

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Thanks, But I already reinstalled the system. – Moshe Beeri Jan 20 '14 at 7:51
In case you encounter the same issue again this should help you. – anurag-jain Jan 21 '14 at 7:16
This worked for me – Luis Lobo Borobia Nov 18 '14 at 22:19
deleting ~/.cache/unity* worked for me – isalgueiro Aug 18 '15 at 16:29

I got the same issue, for me reapplying of filters (in top right corner of your screenshot) worked. I still sometimes come across of Unity not showing applications after reboot, so I have to manually reapply filter settings.

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