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I just installed Marlin file browser, from the marlin-dev ppa.

Problem is, wehn i try to launch it, i get this error:

stewart@StudioLaptop2:~$ marlin
marlin: error while loading shared libraries: cannot open shared object file: No such file or directory

What should I do?

P.S. - I've tried it in Gnome-shell and Unity, but get same error :(

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Remove Unity 5.0 and install back the original Ubuntu 11.10 Unity and it will work. Without it, many applications compiled against Unity will fail to start. – Alin Andrei Jan 15 '12 at 22:37

Not a very proper solution ...

  sudo ln -s /usr/lib/ /usr/lib/

... but it works as expected.

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Solution (at least for ubuntu 11.10 oneiric ocelot):

sudo apt-get install libunity6

To find the package of an installed file:

$ dpkg -S libunity6
libunity6: /usr/lib/

To find the package of a missing file:

  1. Go to
  2. Scroll down to "Search the contents of packages" and type in the filename, e.g.

..and voila!

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Install apt-find and search the required packages:


It should give You the name of the package containing the required lib. Then write:

sudo apt-get install package_name

It will help only if the problem occurs because of unresolved dependencies. If it doesn't help, try reinstalling the software.

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what You mean? Where is written that there's no apt-find? – Misery Jan 24 '12 at 8:01
My apologies, it appears the answer I linked to has been deleted. Regardless, I'm just pointing out that I too cannot locate apt-find in the official repositories. What version of Ubuntu are you using? – Christopher Kyle Horton Jan 24 '12 at 8:18
Also, searching for apt-find at turns up nothing, regardless of version. I'm guessing you are using an older release (i.e., pre-Lucid). – Christopher Kyle Horton Jan 24 '12 at 8:25
Im using Lucid, but haven't been using apt-find for a while so i just didn't know it has been removed. What is instead of it? – Misery Jan 24 '12 at 14:50
It looks like the command to use is now apt-file (specifically, the apt-find command would be replaced by apt-file search – Christopher Kyle Horton Jan 24 '12 at 15:23

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