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		Hi everyone, 
I've downloaded, unzipped and copied icon sets to my /usr/share/icons folder, but when I go to Appearance and try to apply said icons, they're not in the list. 
I've rebooted several times, I can't find them. 
When I sudo update-icon-caches /usr/share/icons/*, I get an error message for one of the sets (Arc-ICONS), but that's it. 
	
	
	
	
	
 
 
	
	
	
		
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		look in your home folder and press ctrl + H so that you see the hidden folders.look for .icons, if not there create the folder .icons.Put your icon theme in it and choose from the appaerence in settings
	
	
	
	
	
 
 
	
	
	
		
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		I have actually done both, place them in that folder under my home directory AND in the usr/share/icons folder, but nothing seems to work. I've even deleted them completely, purged the icon cache, then put them back in, still no go. 
There's no X on any sub-folder in either directory indicating they're of the wrong format or something like that. I'm going to try again, but I'm not hopeful... :-( 
	
	
	
	
	
 
 
	
	
	
		
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		Moltke, when I enter the command with no "s" at the end of cache, like: 
 
 sudo update-icon-cache /usr/share/icons/* 
 
Terminal says "command not found". I've also tried the other command you mentioned ("sudo gtk-update-icon-cache /home/your_user/.icons/Icon-Theme-Name") and Terminal returns "no theme index file". 
 
Short of installing via another means (i wonder if there's a .deb file for that icon set), I don't see what else I can do. I like the Arc icons, but I like Paper better.