sudo sh -c "echo 'deb /' >> /etc/apt/sources.list.d/arc-theme.list" sudo apt-get update sudo apt-get install arc-theme 

After this I am getting this error in Synaptic:

E: Type 'dep' is not known on line 1 in source list /etc/apt/sources.list.d/arc-theme.list E: The list of sources could not be read. Go to the repository dialog to correct the problem. E: _cache->open() failed, please report. 

I can't even carry out any updates.

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1 Answer

Open up the terminal and type:

gksu gedit /etc/apt/sources.list.d/arc-theme.list 

This will open up the file in gedit.
Find (Ctrl + F) the line with the dep entry and delete it.
Save file and close gedit. Then try updating again.

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